Electronics Engineering MCQs [Quiz 42]

Q1. A law which states that when a constant electromotive force is applied to a circuit consisting of a resistor and capacitor connected in series, the time taken for the potential on the plates of the capacitor to rise to any given fraction of its final value depends only on the product of capacitance and resistance.
A. Child’s law
B. CR law
C. Coulomb’s law
D. Debye T3 law

Q2. At parallel resonance, the currents flowing through L and C are
A. Infinite
B. Zero
C. Unequal
D. Equal

Q3. In a rectangular wave, the peak factor is
A. 1.16
B. 1.73
C. 1.11
D. 1.0

Q4. In an RL series circuit,
A. Current lags voltage by less than 90˚
B. Current lags voltage by 180˚
C. Current lags voltage by 90˚
D. Current leads voltage by 90˚

Q5. In a pure capacitance,
A. Current leads voltage by 90˚
B. Current leads voltage by 180˚
C. Current lags voltage by 90˚
D. Current lags voltage by 180˚

Q6. The ohmic value of a resistor with negative temperature coefficient
A. Increases with increasing temperature
B. Increase with decreasing temperature
C. Stays unchanged with temperature change
D. Stays unaffected even with increasing temperature

Q7. Which of the statements below is not true?
A. Current source is an active element
B. Resistor is a linear element
C. Voltage source is a passive element
D. Diode is a non-linear element

Q8. Which of the following elements is active?
A. Resistor
B. Inductor
C. Capacitor
D. Ideal voltage source

Q9. What is the complex impedance of a circuit with an absolute resistance of 300 fi?
A. 0 + j 300 fi
B. 300 + j 90 fi
C. 0 – j 300 fi
D. 300 + j 0 fi

Q10. The potential gradient in a cable is maximum in
A. Conductor
B. Outer sheath
C. Insulation
D. Uniformly all over

Updated: 31st August 2019 — 10:10 PM

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