RL Circuits MCQ

RL Circuits MCQ

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  • 26th Aug, 2022

RL Circuits MCQ Questions

Take RL Circuits MCQ Test to Test Your Knowledge

Practice here the best RL Circuits MCQ Questions that check your basic knowledge of RL Circuits. This RL Circuits MCQ Test contains 20+ Multiple Choice Questions. You have to select the right answer to the question. Apart from this, you can also download RL Circuits MCQ PDF, completely free.

RL Circuits MCQ

1) What do you know about RL circuit?

  • A. an electric circuit composed of resistors and inductors driven by a voltage or current source
  • B.conductor
  • C.an device composed of resistors and inductors driven by a voltage or current source.
  • D.None of the above

2) RL circuit is also known as:

  • A. conductor
  • B.resistor–inductor circuit or RL filter or RL network
  • C.inductor
  • D.All of the above

3) The phase angle (θ) of a series RL circuit varies directly with frequency.

  • A. True
  • B.False

4) What is the relationship between current flowing in the circuit I, current through resistor IR and inductor IL in RL circuit?

  • A. I= IL= IR
  • B.IL+ IL=I
  • C.IL- IR=I
  • D.None of the above

5) The apply voltage in RL circuit must be equal to:

  • A. sum of voltage drop across resistor and inductor
  • B.difference of voltage drop
  • C.voltage drop across resistor
  • D.All of the above
Download Free : RL Circuits MCQ PDF

6) What is the relationship between the impedance of series Z, resistance (R) and inductive reactance (XL) of the RL circuit?

  • A. Z = (R2 + XL2)0.5
  • B.Z = (R2 + XL2)5
  • C.Z = (R3 + XL2)0.5
  • D.Z = (R2 + XL3)1\2

7) What is the instantaneous power deliver (P) by voltage source (V)?

  • A. P = VI
  • B.P = VI 2
  • C.P = V/I
  • D.None of the above

8) How many watt power(P) dissipated by the resistor(R) in the form of heat?

  • A. P = I2R (watts)
  • B.P = I0.2R (watts)
  • C.P = IR2 (watts)
  • D.None of the above

9) To increase the current in a series RL circuit, the frequency should be ___.

  • A. increased
  • B.decreased
  • C.constant
  • D.determined without values

10) If frequency increases or decreases in RL circuit, resistance ____.

  • A. remains constant
  • B.decreases
  • C.increases
  • D.Both A and B

11) Inductive reactance is directly proportional to frequency.

  • A. True
  • B.False

12) In series RL circuit, if frequency increases, then the phase angle θ____.

  • A. decreases
  • B.increases
  • C.constant
  • D.None of the above

13) When the frequency of the voltage applied to a series RL circuit is decreased, the impedance decreases.

  • A. True
  • B.False

14) Reactive power is measured in the unit of ___.

  • A. Volt-Amps-Reactive (VAR)
  • B.Volt-Amps-Resistance (VAR)
  • C.Volt-Watt-Reactive (VAR)
  • D.None of the above

15) Power dissipated by a load is referred to as___.

  • A. true power
  • B.false power.
  • C.Voltage
  • D.All of the above

16) A 470 Ω resistor and a coil with 125 Ω inductive reactance are in parallel. Both components are across a 15 V ac voltage source. Current through the inductor is ___.

  • A. 152 mA
  • B.32 mA
  • C.12 mA
  • D.120 mA

17) Which of the following power factors results in less energy loss in an RL circuit?

  • A. 0.2
  • B.0.4
  • C.1.0
  • D.None of the above

18) In a parallel RL circuit, there are 3 A rms in the resistive branch and 3 A rms in the inductive branch. The total rms current is ___.

  • A. 6 A
  • B.424 mA
  • C.4.24 A
  • D.42.4 A

19) Is the impedance of an RL circuit varies inversely with frequency?

  • A. Yes
  • B.No

20) A 1.2 kΩ resistor is in series with a 15 mH coil across a 10 kHz ac source. The magnitude of the total impedance is ___.

  • A. 152.6 Ω
  • B.1,526 Ω
  • C.1,200 Ω
  • D.942 Ω

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