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19EE2151 CT U4 REVISION TEST

Total questions: 25

Worksheet time: 13mins

Name
Class
Date
1.

Transient Voltage across the Resistor

a)

V/R

b)

IR

c)

I/R

d)

All the

options are correct

2.

Transient Voltage across an Inductor

a)

L x (di/dt)

b)

L x (dv/dt)

c)

LI x (dv/dt)

d)

L x (di/dv)

3.

A circuit containing energy storage elements

a)

Resistor

b)

Inductor

c)

Capacitor

d)

Inductor and Capacitor are correct

4.

Energy Stored in an Inductor

a)

1/2 C^2V

b)

1/2 CV

c)

1/2 LI^2

d)

2 LI^2

5.

Time Constant in RC Series circuit

a)

LC

b)

RC

c)

L/C

d)

RLC

6.

After how many time constants, the transient part reaches more than 99 percent of its final value?

a)

2

b)

3

c)

4

d)

5

7.

The current in the RL circuit at a time t = 0+ is?

a)

V/R

b)

VR

c)

R/V

d)

IR

8.

In an RC circuit , when the switch is closed, the response

a)

do not vary with time

b)

decays with time

c)

rises with time

d)

None of the options are correct

9.

The back emf produced as an inductor charges up is proportional to

a)

The supply EMF

b)

The charging Current

c)

The Voltage across the Inductor

d)

The rate of change of the applied current

10.

Time constant is the time taken for response to rise _________ of maximum value

a)

100 Percentage

b)

90 Percentage

c)

63.2 Percentage

d)

68.2 Percentage

11.

For steady state current, inductor acts as

a)

Short Circuit

b)

Open circuit

c)

Voltage Source

d)

Current Source

12.

In steady state condition capacitor acts as

a)

Short circuit

b)

Open circuit

c)

Voltage Source

d)

Circuit Blown

13.

What is the relation between time period T and frequency?

a)

T = 0.5 / frequency

b)

T = 1.5 / frequency

c)

T = 1 / frequency

d)

All the options are correct

14.

A Circuit containing energy dissipating element(s)

a)

Resistor

b)

Inductor

c)

Capacitor

d)

All the options are correct

15.

Time constant of an RL series circuit is defined as the time during which the current increases to

a)

36.8 percentage of its steady state value

b)

68.2 percentage of its steady state value

c)

63.2 percentage of its steady state value

d)

73.2 percentage of its steady state value

16.

In a RLC Transient circuit , if discriminant positive then current is

a)

Critically Damped

b)

Over Damped

c)

Oscillating

d)

No Oscillating

17.

In a RLC Transient circuit , if discriminant Zero then current is

a)

Critically Damped

b)

Oscillating

c)

No Oscillating

d)

Under Damped

18.

The current in the RL circuit at a time t = 0+ is?

a)

V/R

b)

I/R

c)

IR

d)

R/V

19.

A RC circuit connected to a DC supply will, for a time after a voltage is applied to it, behave as though the capacitors were very ____________ value resistances, but these effects will disappear after a time approximately

equal to ___________ time constants.

a)

Low and One

b)

Low and Five

c)

Low and Two

d)

Low and Three

20.

The back emf produced when an inductor is first conneted to a DC supply is

a)

Proportional to the applied voltage

b)

Inversely proportional to the value of inductance

c)

Initially high and then gradually reduces

d)

Initially low and then gradually increases

21.

In RLC series circuit, if the voltage across capacitor is greater than voltage across inductor, then power factor of the network is

a)

Lagging

b)

Leading

c)

Unity

d)

Zero

22.

By which of the following element(s) transients will not occur?

a)

R

b)

L

c)

C

d)

All the options are correct

23.

A circuit having constant sources is said to be in steady state

a)

if the current and voltages are changing

b)

if the current and voltages do not change with impedance

c)

if the current and voltages do not change with time

d)

None of the options are correct

24.

The behavior of the voltage and current, when it is changed from one state to other state is

a)

Steady State

b)

Transient State

c)

Oscillating slowly

d)

None of the options are correct

25.

Time constant of RL Series circuit can be found from

a)

L^2/R

b)

L/R

c)

LR

d)

RC