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Quizzes > Science > Other Sciences

Free Sukkur IBA ECE & JEST Mock Test - Ready to Ace It

Think you can ace the Sukkur IBA ECE practice test? Dive in and prove your JEST mastery!

Difficulty: Moderate
2-5mins
Learning OutcomesCheat Sheet
Paper art illustration for quiz on dark blue background with exam timer and mock test for Sukkur IBA ECE and JEST

Feeling the jitters about your engineering exam? Take our Free ECE & JEST mock test - Sukkur IBA Pattern Challenge! This Sukkur IBA ECE JEST mock test mirrors the actual format so you can assess your core theory and tackle tricky problems. Dive into the Sukkur IBA ECE practice test section and switch to the online JEST test ECE module for full coverage. Boost your skills with a quick timed practice challenge or try our interactive JEST quiz . Whether you aim to ace the IBA Sukkur mock exam or explore a free ECE JEST quiz, you'll get exam-ready fast. Ready to start? Jump in now!

What is the SI unit of capacitance?
Farad
Henry
Ohm
Tesla
The SI unit of capacitance is the farad, named after Michael Faraday. One farad corresponds to one coulomb per volt. It quantifies a capacitor’s ability to store electric charge. https://en.wikipedia.org/wiki/Capacitance
According to Ohm's Law, what is the relationship between voltage (V), current (I), and resistance (R)?
V = I × R
I = V × R
R = V × I
V = I / R
Ohm's Law states that voltage equals current multiplied by resistance (V = IR). It's fundamental for analyzing electrical circuits. The law holds for many conductive materials under steady-state conditions. https://en.wikipedia.org/wiki/Ohm%27s_law
Which law states that the sum of voltages around any closed loop in a circuit equals zero?
Kirchhoff’s Voltage Law
Kirchhoff’s Current Law
Thevenin’s Theorem
Norton’s Theorem
Kirchhoff’s Voltage Law (KVL) states that the algebraic sum of all voltages around a closed circuit loop is zero. This follows energy conservation. KVL is essential for circuit analysis. https://en.wikipedia.org/wiki/Kirchhoff%27s_circuit_laws#Kirchhoff%27s_voltage_law
What is the typical forward voltage drop of a silicon diode?
0.7 V
0.3 V
1.2 V
0 V
A silicon diode typically has a forward voltage drop around 0.7 V when conducting. This drop varies slightly with current and temperature. It’s a key parameter in designing rectifier circuits. https://en.wikipedia.org/wiki/Diode
In digital logic, an OR gate outputs 0 when:
Both inputs are 0
At least one input is 1
Both inputs are 1
One input is 0
An OR gate outputs 1 if any input is 1; otherwise it outputs 0. Thus it only produces 0 when both inputs are 0. This is fundamental in Boolean logic. https://en.wikipedia.org/wiki/Logical_disjunction
What decimal number does binary 1010 represent?
10
8
12
6
Binary 1010 equals 1×2³ + 0×2² + 1×2¹ + 0×2? = 8 + 0 + 2 + 0 = 10. Converting between binary and decimal is essential in digital systems. https://en.wikipedia.org/wiki/Binary_number
What is the SI prefix for 10?³?
Milli
Micro
Nano
Kilo
The SI prefix for 10?³ is 'milli', symbol 'm'. It's commonly used for measurements like milliamps or millivolts. https://en.wikipedia.org/wiki/Metric_prefix#List_of_SI_prefixes
Which assumption is made about an ideal operational amplifier’s open-loop gain?
Infinite
Zero
Unity
Equal to input resistance
In ideal op-amp models, open-loop gain is assumed infinite. This ensures input differential voltage is effectively zero under feedback. It simplifies amplifier circuit analysis. https://en.wikipedia.org/wiki/Operational_amplifier
At resonance, what is the net reactance of an LC series circuit?
Zero
Infinite
Equal to R
Inductive
At resonance in an LC series circuit, inductive and capacitive reactances cancel, yielding zero net reactance. Only the resistive component remains. https://en.wikipedia.org/wiki/Resonant_circuit
What is the approximate speed of light in vacuum?
3×10? m/s
3×10? m/s
1.5×10? m/s
3×10? m/s
The speed of light in vacuum is approximately 3×10? meters per second, a fundamental constant of nature. It underpins relativity and electromagnetic theory. https://en.wikipedia.org/wiki/Speed_of_light
What is the standard AC mains frequency in Pakistan?
50 Hz
60 Hz
400 Hz
100 Hz
Pakistan’s power grid uses a standard frequency of 50 Hz for alternating current supply. This affects transformer design and appliance compatibility. https://en.wikipedia.org/wiki/Electric_power_in_Pakistan
Bandwidth of a filter is defined as the difference between:
High and low cutoff frequencies
Resonant and cutoff frequencies
Input and output frequencies
Peak and zero frequencies
Filter bandwidth is the range between its upper and lower cutoff frequencies where power drops by 3 dB. It determines the signal range the filter passes. https://en.wikipedia.org/wiki/Bandwidth_(signal_processing)
Two 10 ? resistors in series yield an equivalent resistance of:
20 ?
5 ?
10 ?
0 ?
Resistors in series add: 10 ? + 10 ? = 20 ?. This rule simplifies many circuit calculations. https://en.wikipedia.org/wiki/Series_and_parallel_circuits
Two 10 ? resistors in parallel yield an equivalent resistance of:
5 ?
20 ?
10 ?
0 ?
Parallel resistors follow 1/R_eq = 1/R1 + 1/R2. So 1/R_eq = 1/10 + 1/10 = 2/10, R_eq = 5 ?. https://en.wikipedia.org/wiki/Series_and_parallel_circuits
Which basic flip-flop has inputs S (set) and R (reset)?
SR Flip-Flop
D Flip-Flop
JK Flip-Flop
T Flip-Flop
An SR flip-flop uses Set and Reset inputs to store a bit. It’s the simplest bistable storage element in digital electronics. https://en.wikipedia.org/wiki/Flip-flop_(electronics)
Which modulation technique varies carrier amplitude?
Amplitude Modulation
Frequency Modulation
Phase Modulation
Pulse-Code Modulation
Amplitude Modulation (AM) varies the carrier’s amplitude in line with the message signal. It’s widely used in broadcast radio. https://en.wikipedia.org/wiki/Amplitude_modulation
Thevenin’s Theorem allows replacement of any linear network by:
Voltage source and series resistance
Current source and parallel resistance
Single resistor
Ideal transformer
Thevenin’s Theorem states a linear two-terminal network can be replaced by a single voltage source in series with a resistance. This greatly simplifies circuit analysis. https://en.wikipedia.org/wiki/Thevenin%27s_theorem
In an RC circuit, the time constant ? equals:
R × C
R / C
C / R
1 / (R × C)
Time constant ? of an RC circuit is the product of resistance and capacitance (? = RC). It represents the time for the voltage to reach ~63% of its final value. https://en.wikipedia.org/wiki/RC_circuit#Time_constant
Which region of a BJT is used for linear amplification?
Forward-active region
Cutoff region
Saturation region
Reverse-active region
In the forward-active region, the emitter–base junction is forward biased and the collector–base junction reversed, enabling amplification. This is standard for analog amplifier design. https://en.wikipedia.org/wiki/Bipolar_junction_transistor#Forward_active_region
Fourier series expansion breaks a periodic signal into:
Sine and cosine components
Exponentials only
Rectangular pulses
Delta functions
A Fourier series expresses a periodic function as sums of sines and cosines or complex exponentials. This reveals harmonic content for signal analysis. https://en.wikipedia.org/wiki/Fourier_series
A half-wave rectifier’s DC output level equals the input AC peak of 10 V, minus:
0.7 V (diode drop)
1.2 V
2 V
0 V
An ideal silicon diode drops ~0.7 V when forward biased. Therefore, a 10 V peak AC half-wave rectifies to ?9.3 V DC. https://en.wikipedia.org/wiki/Rectifier#Half-wave_rectifier
S-parameter S11 represents:
Input reflection coefficient
Output reflection coefficient
Forward transmission
Reverse transmission
S11 is the ratio of reflected wave to incident wave at the input port, indicating how much power is reflected. It’s crucial in RF network design. https://en.wikipedia.org/wiki/S-parameters
The Nyquist sampling rate is:
Twice the maximum signal frequency
Equal to signal bandwidth
Half the maximum signal frequency
Independent of frequency
The Nyquist rate must be at least twice the highest frequency component in the signal to avoid aliasing. This criterion is fundamental in digital sampling. https://en.wikipedia.org/wiki/Nyquist_rate
An ideal current source has:
Infinite internal resistance
Zero internal resistance
Fixed voltage
Dependent output current
An ideal current source maintains constant current regardless of voltage across it, implying infinite internal resistance. This is a basic circuit idealization. https://en.wikipedia.org/wiki/Current_source
Which modulation varies the carrier frequency?
Frequency Modulation
Amplitude Modulation
Phase Modulation
Pulse Modulation
Frequency Modulation (FM) varies the instantaneous frequency of the carrier in accordance with the message signal. It offers better noise immunity than AM. https://en.wikipedia.org/wiki/Frequency_modulation
A first-order low-pass filter’s 3 dB cutoff equals its pole frequency. True or False?
True
False
Depends on Q factor
Only for Butterworth
For a first-order RC low-pass filter, the pole frequency (1/RC) is where output falls by 3 dB. Thus the cutoff equals the pole frequency. https://en.wikipedia.org/wiki/First-order_filter
Ampère’s Law relates magnetic field to:
Enclosed current
Electric potential
Electric displacement
Charge density
Ampère’s Law states that the line integral of magnetic field around a closed loop equals µ? times the enclosed current. It’s a fundamental Maxwell equation. https://en.wikipedia.org/wiki/Ampère%27s_circuital_law
In a synchronous motor, rotor speed locks to:
Supply frequency
Torque angle
Stator current
Voltage magnitude
A synchronous motor’s rotor rotates at a speed proportional to the supply frequency (synchronous speed). It remains locked in step under load. https://en.wikipedia.org/wiki/Synchronous_motor
What is the primary advantage of a Class A amplifier?
Lowest distortion
Highest efficiency
Smallest size
No biasing needed
Class A amplifiers conduct over entire input cycle, producing the least distortion. However, they’re less efficient than other classes. https://en.wikipedia.org/wiki/Amplifier_classes
In a two-port network, the h-parameters relate:
Input voltage/current to output current/voltage
Impedance to admittance
Forward to reverse gain
Voltage to power
H-parameters (hybrid) express port voltages and currents linearly: V1 = h11 I1 + h12 V2; I2 = h21 I1 + h22 V2. They’re used for transistor small-signal models. https://en.wikipedia.org/wiki/H-parameters
Maxwell’s correction to Ampère’s Law adds the displacement current term. True or False?
True
False
Only in static cases
In no case
Maxwell introduced the displacement current (?D/?t) to Ampère’s Law, making it consistent with charge conservation and enabling electromagnetic wave prediction. https://en.wikipedia.org/wiki/Maxwell%27s_equations
The Smith chart is used to visualize:
Complex impedance and reflection coefficients
Time-domain signals
Digital logic states
Magnetic field lines
A Smith chart graphically represents normalized impedances and reflection coefficients in RF engineering, simplifying matching network design. https://en.wikipedia.org/wiki/Smith_chart
A Butterworth filter is characterized by:
Maximally flat passband
Equal ripple in passband
Maximally flat stopband
Linear phase
Butterworth filters are designed for a maximally flat magnitude response in the passband, with no ripples. This makes them ideal for audio and instrumentation. https://en.wikipedia.org/wiki/Butterworth_filter
Which coding technique ensures DC balance and provides clock recovery in serial links?
8b/10b encoding
Manchester coding
NRZ-L
Unipolar RZ
8b/10b encoding maps 8-bit words to 10 bits, ensuring DC balance and enough transitions for clock recovery in high-speed serial communications. https://en.wikipedia.org/wiki/8b/10b_encoding
In microwave engineering, S21 measures:
Forward transmission gain
Input reflection
Reverse isolation
Load impedance
S21 is the forward transmission coefficient, indicating how much power is delivered from port 1 to port 2. It’s key for amplifier and network analysis. https://en.wikipedia.org/wiki/S-parameters
What determines the Q-factor of a resonant circuit?
Ratio of reactance to resistance at resonance
Bandwidth only
Input impedance
Supply voltage
Q-factor equals resonant reactance divided by series resistance or resonant frequency divided by bandwidth. It measures resonance sharpness. https://en.wikipedia.org/wiki/Q_factor
In digital filter design, a Chebyshev filter has:
Ripple in passband
Flat passband
Ripple in stopband only
Linear phase
Chebyshev Type I filters allow passband ripple to achieve a steeper roll-off than Butterworth filters. This trades magnitude flatness for bandwidth. https://en.wikipedia.org/wiki/Chebyshev_filter
A microprocessor’s addressing mode that uses an offset plus index register is called:
Indexed addressing
Immediate addressing
Indirect addressing
Relative addressing
Indexed addressing adds a constant offset to the contents of an index register to form the effective address. It’s widely used in array and loop constructs. https://en.wikipedia.org/wiki/Addressing_mode
Gauss’s Law in electromagnetics deals with:
Electric flux through a closed surface
Magnetic flux through a surface
Voltage around a loop
Current density
Gauss’s Law states that the net electric flux through a closed surface equals the enclosed charge divided by ??. It’s a fundamental Maxwell equation. https://en.wikipedia.org/wiki/Gauss%27s_law
What is the effect of increasing the order of a digital FIR filter?
Sharper transition band
Higher ripple
Lower computational cost
Reduced latency
Increasing FIR filter order improves its ability to approximate ideal frequency responses, resulting in a sharper transition between passband and stopband. https://en.wikipedia.org/wiki/Finite_impulse_response
Which phenomenon explains signal attenuation in optical fibers due to scattering?
Rayleigh scattering
Raman scattering
Brillouin scattering
Mie scattering
Rayleigh scattering, caused by microscopic density fluctuations, is the primary source of signal loss in optical fibers at telecom wavelengths. https://en.wikipedia.org/wiki/Rayleigh_scattering
The propagation constant in a lossy transmission line is composed of:
Attenuation constant + j phase constant
Characteristic impedance
Load reflection coefficient
Standing wave ratio
The propagation constant ? = ? + j? combines the attenuation constant ? and phase constant ?, describing amplitude decay and phase shift per unit length. https://en.wikipedia.org/wiki/Transmission_line#General_transmission_line
In a rectangular waveguide, the dominant mode is:
TE??
TM??
TE??
TEM
In rectangular waveguides, the TE?? mode has the lowest cutoff frequency and thus is the dominant propagating mode. https://en.wikipedia.org/wiki/Waveguide_(electromagnetism)#Rectangular_waveguide
The Nyquist stability criterion uses a plot of 1 + L(j?) encirclements of -1. True or False?
True
False
Only for discrete systems
Only in time domain
Nyquist’s criterion assesses closed-loop stability by counting encirclements of -1 by the open-loop L(j?) plot. It applies to continuous and discrete systems. https://en.wikipedia.org/wiki/Nyquist_stability_criterion
In modulation theory, the modulation index for FM is:
Frequency deviation divided by modulating frequency
Amplitude deviation divided by frequency
Phase deviation divided by amplitude
Ratio of carrier to sideband power
FM modulation index ? = ?f / fm, where ?f is peak frequency deviation and fm is modulating frequency. It determines bandwidth and sideband structure. https://en.wikipedia.org/wiki/Frequency_modulation#Modulation_index
Shannon’s channel capacity theorem states capacity C = B log?(1 + S/N). True or False?
True
False
Only for analog channels
Only for noiseless channels
Shannon’s capacity formula C = B·log?(1 + S/N) gives the maximum data rate over bandwidth B with signal-to-noise ratio S/N. It’s fundamental in information theory. https://en.wikipedia.org/wiki/Shannon–Hartley_theorem
In electron wave mechanics (JEST level), the de Broglie wavelength ? = h/p. True or False?
True
False
Only for photons
Only in vacuum
de Broglie proposed that particles have wavelength ? = h/p, linking momentum p and Planck’s constant h. This underlies wave–particle duality. https://en.wikipedia.org/wiki/De_Broglie_wavelength
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Study Outcomes

  1. Understand Exam Structure -

    Familiarize yourself with the Sukkur IBA ECE JEST mock test format, including question types and scoring rules, to build confidence before the real exam.

  2. Analyze Performance Metrics -

    Use instant scoring feedback from this free ECE JEST quiz to track your accuracy and speed, helping you identify areas that need targeted review.

  3. Identify Knowledge Gaps -

    Pinpoint strengths and weaknesses in electronics, communication, and physics by reviewing detailed results from the Sukkur IBA ECE practice test.

  4. Apply Effective Strategies -

    Learn proven techniques for tackling real-pattern questions in an online JEST test ECE setting, enhancing your problem-solving efficiency under timed conditions.

  5. Optimize Time Management -

    Develop pacing strategies for the IBA Sukkur mock exam to ensure you allocate appropriate time to each section and minimize last-minute rush.

  6. Refine Conceptual Mastery -

    Leverage quiz insights to revisit challenging topics, solidify your understanding of core concepts, and boost overall exam readiness.

Cheat Sheet

  1. Fourier Transform Fundamentals -

    Master the continuous-time Fourier transform pair X(jω)=∫x(t)e−jωtdt and its inverse; many questions in the Sukkur IBA ECE JEST mock test hinge on converting time-domain signals to the frequency domain. Practice with a rectangular pulse yielding a sinc(ωT)/ω pattern and recall the "time”shift" and "scaling" properties by using the mnemonic "Shift, Scale, Phase." Reviewing examples from MIT OpenCourseWare will boost your confidence for the free ECE JEST quiz.

  2. Transistor Biasing Techniques -

    Understand fixed-bias versus voltage-divider bias for BJTs by sketching DC load lines and computing Q-points, as often featured in the IBA Sukkur mock exam. Use the formula VCEQ = VCC−ICQRC to ensure active-region operation. Practicing problems from IEEE journals and NPTEL lectures will make these concepts second nature in your online JEST test ECE.

  3. Digital Logic Simplification -

    Review Karnaugh maps (K-maps) and Boolean algebra to minimize logic expressions like F(A,B,C)=Σ(1,3,5,7) for speed and cost efficiency; this skill frequently appears in Sukkur IBA ECE practice test questions. Apply De Morgan's laws (¬(A·B)=¬A+¬B) as a quick-check trick. Working through examples on official university repositories ensures you'll breeze through the free ECE JEST quiz's digital section.

  4. Maxwell's Equations & Wave Propagation -

    Memorize the integral and differential forms of Maxwell's equations (∇·E=ϝ/ε₀, ∇×E=−∂B/∂t, ∇·B=0, ∇×B=μ₀J+μ₀ε₀∂E/∂t) since they are staples in the Sukkur IBA ECE JEST mock test. Understand plane”wave solutions in free space, E(z,t)=E₀cos(kz−ωt), to tackle propagation problems confidently. Reference examples from the IEEE Antennas and Propagation Society for real”world context.

  5. Quantum Mechanics for JEST Physics -

    Familiarize yourself with the time-independent Schrödinger equation −(ħ²/2m)d²ψ/dx²+V(x)ψ=Eψ, especially for infinite potential wells where ψₙ(x)=√(2/L)sin(nπx/L). Many online JEST test ECE sections challenge your grasp of quantization rules and probability densities. Use mnemonic "Pretty Darn Vibrant" for Planck, de Broglie, Heisenberg, and Schrödinger to keep key principles at your fingertips during the free ECE JEST quiz.

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