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Quizzes > General Knowledge & Mixed

ECE test and JEST practice with the Sukkur IBA pattern

Quick, free practice exam for JEST and ECE. Instant results and answer review.

Editorial: Review CompletedCreated By: David MilnerUpdated Aug 25, 2025
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

Use this quiz to practice the Sukkur IBA ECE and JEST pattern, check your knowledge, and build speed with instant scoring. You will answer exam-style items, review solutions, and see where to improve before the teacher recruitment assessment; for extra drills, try our ic3 practice test and the general education practice test.

What is the SI unit of capacitance?
Ohm
Henry
Tesla
Farad
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.
According to Ohm's Law, what is the relationship between voltage (V), current (I), and resistance (R)?
V = I / R
R = V × I
V = I × R
I = V × 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.
Which law states that the sum of voltages around any closed loop in a circuit equals zero?
Kirchhoff's Current Law
Kirchhoff's Voltage 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.
What is the typical forward voltage drop of a silicon diode?
0.7 V
1.2 V
0 V
0.3 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.
In digital logic, an OR gate outputs 0 when:
At least one input is 1
Both inputs are 0
One input is 0
Both inputs are 1
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.
What decimal number does binary 1010 represent?
8
6
12
10
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.
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.
Which assumption is made about an ideal operational amplifier's open-loop gain?
Zero
Equal to input resistance
Infinite
Unity
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.
At resonance, what is the net reactance of an LC series circuit?
Zero
Equal to R
Infinite
Inductive
At resonance in an LC series circuit, inductive and capacitive reactances cancel, yielding zero net reactance. Only the resistive component remains.
What is the approximate speed of light in vacuum?
1.5×10? m/s
3×10? m/s
3×10? 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.
What is the standard AC mains frequency in Pakistan?
400 Hz
100 Hz
60 Hz
50 Hz
Pakistan's power grid uses a standard frequency of 50 Hz for alternating current supply. This affects transformer design and appliance compatibility.
Bandwidth of a filter is defined as the difference between:
Input and output frequencies
High and low cutoff frequencies
Peak and zero frequencies
Resonant and cutoff 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.
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.
Two 10 ? resistors in parallel yield an equivalent resistance of:
20 ?
0 ?
5 ?
10 ?
Parallel resistors follow 1/R_eq = 1/R1 + 1/R2. So 1/R_eq = 1/10 + 1/10 = 2/10, R_eq = 5 ?.
Which basic flip-flop has inputs S (set) and R (reset)?
SR Flip-Flop
D Flip-Flop
T Flip-Flop
JK 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.
Which modulation technique varies carrier amplitude?
Amplitude Modulation
Pulse-Code Modulation
Phase Modulation
Frequency Modulation
Amplitude Modulation (AM) varies the carrier's amplitude in line with the message signal. It's widely used in broadcast radio.
Thevenin's Theorem allows replacement of any linear network by:
Ideal transformer
Single resistor
Voltage source and series resistance
Current source and parallel resistance
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.
In an RC circuit, the time constant ? equals:
C / R
1 / (R × C)
R × C
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.
Which region of a BJT is used for linear amplification?
Saturation region
Cutoff region
Forward-active 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.
Fourier series expansion breaks a periodic signal into:
Exponentials only
Rectangular pulses
Delta functions
Sine and cosine components
A Fourier series expresses a periodic function as sums of sines and cosines or complex exponentials. This reveals harmonic content for signal analysis.
A half-wave rectifier's DC output level equals the input AC peak of 10 V, minus:
1.2 V
0 V
0.7 V (diode drop)
2 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.
S-parameter S11 represents:
Reverse transmission
Input reflection coefficient
Output reflection coefficient
Forward 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.
The Nyquist sampling rate is:
Equal to signal bandwidth
Independent of frequency
Twice the maximum signal frequency
Half the maximum signal 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.
An ideal current source has:
Dependent output current
Infinite internal resistance
Zero internal resistance
Fixed voltage
An ideal current source maintains constant current regardless of voltage across it, implying infinite internal resistance. This is a basic circuit idealization.
Which modulation varies the carrier frequency?
Frequency Modulation
Phase Modulation
Amplitude 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.
A first-order low-pass filter's 3 dB cutoff equals its pole frequency. True or False?
False
Only for Butterworth
Depends on Q factor
True
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.
Ampère's Law relates magnetic field to:
Charge density
Enclosed current
Electric potential
Electric displacement
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.
In a synchronous motor, rotor speed locks to:
Torque angle
Voltage magnitude
Stator current
Supply frequency
A synchronous motor's rotor rotates at a speed proportional to the supply frequency (synchronous speed). It remains locked in step under load.
What is the primary advantage of a Class A amplifier?
Smallest size
Lowest distortion
Highest efficiency
No biasing needed
Class A amplifiers conduct over entire input cycle, producing the least distortion. However, they're less efficient than other classes.
In a two-port network, the h-parameters relate:
Voltage to power
Impedance to admittance
Forward to reverse gain
Input voltage/current to output current/voltage
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.
Maxwell's correction to Ampère's Law adds the displacement current term. True or False?
Only in static cases
True
In no case
False
Maxwell introduced the displacement current (?D/?t) to Ampère's Law, making it consistent with charge conservation and enabling electromagnetic wave prediction.
The Smith chart is used to visualize:
Digital logic states
Magnetic field lines
Complex impedance and reflection coefficients
Time-domain signals
A Smith chart graphically represents normalized impedances and reflection coefficients in RF engineering, simplifying matching network design.
A Butterworth filter is characterized by:
Equal ripple in passband
Linear phase
Maximally flat stopband
Maximally flat passband
Butterworth filters are designed for a maximally flat magnitude response in the passband, with no ripples. This makes them ideal for audio and instrumentation.
Which coding technique ensures DC balance and provides clock recovery in serial links?
8b/10b encoding
NRZ-L
Unipolar RZ
Manchester coding
8b/10b encoding maps 8-bit words to 10 bits, ensuring DC balance and enough transitions for clock recovery in high-speed serial communications.
In microwave engineering, S21 measures:
Input reflection
Load impedance
Forward transmission gain
Reverse isolation
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.
What determines the Q-factor of a resonant circuit?
Input impedance
Supply voltage
Bandwidth only
Ratio of reactance to resistance at resonance
Q-factor equals resonant reactance divided by series resistance or resonant frequency divided by bandwidth. It measures resonance sharpness.
In digital filter design, a Chebyshev filter has:
Linear phase
Ripple in passband
Flat passband
Ripple in stopband only
Chebyshev Type I filters allow passband ripple to achieve a steeper roll-off than Butterworth filters. This trades magnitude flatness for bandwidth.
A microprocessor's addressing mode that uses an offset plus index register is called:
Indexed addressing
Immediate addressing
Relative addressing
Indirect 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.
Gauss's Law in electromagnetics deals with:
Voltage around a loop
Current density
Magnetic flux through a surface
Electric flux through a closed surface
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.
What is the effect of increasing the order of a digital FIR filter?
Reduced latency
Sharper transition band
Lower computational cost
Higher ripple
Increasing FIR filter order improves its ability to approximate ideal frequency responses, resulting in a sharper transition between passband and stopband.
Which phenomenon explains signal attenuation in optical fibers due to scattering?
Brillouin scattering
Raman scattering
Mie scattering
Rayleigh scattering
Rayleigh scattering, caused by microscopic density fluctuations, is the primary source of signal loss in optical fibers at telecom wavelengths.
The propagation constant in a lossy transmission line is composed of:
Load reflection coefficient
Characteristic impedance
Standing wave ratio
Attenuation constant + j phase constant
The propagation constant ? = ? + j? combines the attenuation constant ? and phase constant ?, describing amplitude decay and phase shift per unit length.
In a rectangular waveguide, the dominant mode is:
TM??
TEM
TE??
TE??
In rectangular waveguides, the TE?? mode has the lowest cutoff frequency and thus is the dominant propagating mode.
The Nyquist stability criterion uses a plot of 1 + L(j?) encirclements of -1. True or False?
Only for discrete systems
True
False
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.
In modulation theory, the modulation index for FM is:
Frequency deviation divided by modulating frequency
Phase deviation divided by amplitude
Amplitude deviation divided by frequency
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.
Shannon's channel capacity theorem states capacity C = B log?(1 + S/N). True or False?
True
Only for noiseless channels
False
Only for analog 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.
In electron wave mechanics (JEST level), the de Broglie wavelength ? = h/p. True or False?
Only for photons
Only in vacuum
True
False
de Broglie proposed that particles have wavelength ? = h/p, linking momentum p and Planck's constant h. This underlies wave - particle duality.
0
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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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