# Network Theory ELECTRONICS MCQs with answers for IIT JAM 2022

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Here is a compilation of Free  Network Theory ELECTRONICS MCQs  for practice . It  consists of IIT JAM Physics Multiple Choice Questions from the topic Network Theory with Answer Key. These questions can be very useful for the preparation of all the competitive examinations in Physics / Physical Sciences such as IIT JAM, BHU, JNU, DU, HCU and other University M.Sc Entrance Examinations . So, HERE you can test yourself.

## Network Theory ELECTRONICS MCQs with answers 2022 for IIT JAM, BHU, JNU, DU, HCU and other University M.Sc Entrance Examinations

We have compiled the Network Theory ELECTRONICS MCQs with answers 2022 for the Candidates / Students who are preparing for IIT JAM, CSIR JRF NET, GATE and other University M.Sc & Ph.D Entrance Examinations. Practice  Network Theory MCQ (Multiple Choice Questions) with Answers which is very important for students who want to score good marks in their respective examinations.

There are some Network Theory ELECTRONICS MCQs with answers given  below So , attempt these  MCQs and test yourself ….

1. A generator produces 100 A of current at 4000 V. By using a transformer, the voltage is stepped up to 2.4. 105V so that it can be sent to a village on high voltage lines. If the effective resistance of the line is 30 ohms, the power lost in communication is

(a) 63.7 W
(b) 83.7 W
(c) 33.7 W
(d) 93.7 W

2. A 40 uF capacitor is connected to a 50 Ω resistor and a generator whose r.m.s. output is 30 volts at 60 Hz The r.m.s. current is

(a) 0.182 A
(b) 0.061 A
(c) 0.361 A
(d) 0.421 A

3. If two 100 W bulbs are connected in series across 230 V supply, then total power consumed by both the bulbs

(a) 200 W
(b) 100 W
(C) 50 W
(d) 25 W

4. In the network of figure shown below, Vs = 6V. The time constant of the network is

(a) 8 sec
(b) 12 sec
(C) 24 sec
(d) 36 sec

5. Following cannot be used as a core of a transformer

(a) Air
(b) Steel
(c) Aluminium
(d) Ferrite

6. A transformer is used to change

(a) power
(b) frequency
(c) inductance
(d) voltage

7. The SI unit of inductance times capacitance is

(a) second
(b) ohm
(c) hertz
(d) square second

8. A solenoid has an inductance of 50 henry and a resistance of 30 ohm . If it is connected to 100 V battery, then how long will it take for the current to reach one-half of its final steady state value?

(a) 1.45 sec
(b) 1.15 sec
(d) 1.35 sec
(d) 1.25 sec

9. In electrical circuits, the analog of moment of inertia in rotational motion is

(a) resistance
(b) inductance
(c) capacitance
(d) voltage

10. A box of resistors is labelled R ± x% where R is the mean value and x is the tolerance i.e. the rms deviatior given as a percentage of the mean value. Iftwo resistors from a box labelled 10 KΩ ± 5% are connected ir series the equivalent resistance can be labelled 20KΩ ± x% where x is given by

(a) 5/√(2)
(b) 5
(c) 5√(2)
(d) 10

11. In a purely inductance AC source circuit L = 50 mH. The inductive reactance of the circuit when the frequency of AC source is 60 Hz, will be

(a) 18.85 ohm
(b) 3.8 ohm
(c) 6.31 ohm
(d) 12.62 ohm

12. The phase difference (δ) between input and output voltage for the following circuits (i) and (ii)

will be in negative phase

(a) 0 and 0
(b) π/2 and 0 < δ ≤ π/2 respectively
(c) π/2 and π/2
(d) 0 and 0 < δ ≤ π/2 respectively

13. In the following RC circuit, the capacitor was charged
in two different ways.

(i)  The capacitor was first charged to 5V by moving the toggle switch to position P and then it was charged to 10V by moving the toggle switch to position Q

(ii) The capacitor was directly charged to 10V, by keeping the toggle switch at position Q. Assuming the capacitor to be ideal, which one of the following statements is correct?

(a) The energy dissipation in cases (i) and (ii) will be equal and non-zero
(b) The energy dissipation for case (i) will be more than that for case (ii)
(c) The energy dissipation for case (i) will be less than that for case (ii)
(d) The energy will not be dissipated in either case

14. In the circuit given below, a person measures 9.0 V across the battery, 3.0 V across the 2MΩ resistor R, and 4.5 V across the unknown resistor Rb, using an ordinary voltmeter which has a finite input resistance Assuming that the battery has negligible internal resistance, it follows that (i) the resistance Rb and (ii) the input resistance r of the voltmeter are, in M Ω

(a) Rb = 3.0, r = 1.0
(b) Rb = 2.5, r = 7.5
(c) Rb = 4.0, r = 12.0
(d) Rb = 4.5, r = 10.0

15. The current read by the ammeter (A) in the circuit given below is

(a) 27.3 mA
(b) 100.0 mA
(c) 54.5 mA
(d) 50.0 mA

16. A resistance of 10 Ω and an inductance of 100 mH are connected in series with an AC voltage source V = 50 sin(100t). The phase difference between the current in the circuit and applied voltage will be

(a) π
(b) π/2
(c) π/4
(d) zero

17. In a series L-C-R circuit R = 100 Ω, XL = 300 Ω and XC = 200 Ω the current lags the applied voltage by an angle

(a) 45°
(b) 60°
(c) 90°
(d) 0°

18. An ac voltage source (with 120 V and 60 Hz) is connected across a 2μF capacitor. The power loss in the capacitor is

(a) 0.000 watt
(b) 10.800 watt
(c) 1.080 watt
(d) 0.972 watt

19. The equivalent resistance in the following circuit between ‘a’ and ‘b’ is as follows

(a) 3.53  Ω
(b) 5.40  Ω
(c) 0.36  Ω
(d) 4.72  Ω

20. An optical pyrometer gives an output voltage proportional to the incident radiation intensity. When used to measure the temperature of a blackbody at 600 K, it reads 1.5V. It the temperature by 2 K, the change in the the output single is

(a) 5 mV
(b) 10 mV
(c) 20 mV
(d) 33 mV

Hope the information shed above regarding Network Theory ELECTRONICS MCQs with answers 2022 for IIT JAM, BHU, JNU, DU, HCU and other University M.Sc Entrance Examinations  . If you have any other queries , feel free to reach us so that we can revert back to us at the earliest possible.

And if any answer is wrong then feel free to correct us 🤗.

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