# Series Circuits MCQ’s

This set of Network Theory Multiple Choice Questions & Answers (MCQs) focuses on “Series Circuits”.

1. The circuit shown below consists of a 1kΩ resistor connected in series with a 50mH coil, a 10V rms, 10 KHz signal is applied. Find impedance Z in rectangular form.

a) (1000+j0.05) Ω

b) (100+j0.5) Ω

c) (1000+j3140) Ω

d) (100+j3140) Ω

2. Find the current I (mA) in the circuit shown below.

a) 3.03

b) 30.3

c) 303

d) 0.303

3. If we apply a sinusoidal input to RL circuit, the current in the circuit is __________ and the voltage across the elements is _______________

a) square, square

b) square, sinusoid

c) sinusoid, square

d) sinusoid, sinusoid

4. Find the phase angle θ in the circuit shown below.

a) 62.33⁰

b) 72.33⁰

c) 82.33⁰

d) 92.33⁰

5. In the circuit shown below, find voltage across inductive reactance.

a) 9.5

b) 10

c) 9

d) 10.5

6. Find the phase angle in the circuit shown below.

a) 15

b) 16

c) 17

d) 18

7. In the circuit shown below, find the voltage across resistance.

a) 0.303

b) 303

c) 3.03

d) 30.3

8. Determine the source voltage if voltage across resistance is 70V and the voltage across inductor is 20V as shown in the figure.

a) 71

b) 72

c) 73

d) 74

9. An AC voltage source supplies a 500Hz, 10V rms signal to a 2kΩ resistor in series with a 0.1µF capacitor as shown in the following figure. Find the total impedance.

a) 3750.6Ω

b) 3760.6Ω

c) 3780.6Ω

d) 3790.6Ω

10. Find the current I (mA) in the circuit shown below.

a) 2.66

b) 3.66

c) 4.66

d) 5.66

11. Determine the voltage across the resistor in the circuit shown below.

a) 3

b) 4

c) 5

d) 6

12. Determine the phase angle in the circuit shown below.

a) 58

b) 68

c) -58

d) -68

13. Find the voltage across the capacitor in the circuit shown below.

a) 7

b) 7.5

c) 8

d) 8.5

14. In the circuit shown below determine the total impedance.

a) 161

b) 162

c) 163

d) 164

15. Find the current in the circuit shown below.

a) 0.1

b) 0.2

c) 0.3

d) 0.4

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