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This mock test of Alternating Current NAT Level - 1 for Physics helps you for every Physics entrance exam.
This contains 10 Multiple Choice Questions for Physics Alternating Current NAT Level - 1 (mcq) to study with solutions a complete question bank.
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*Answer can only contain numeric values

QUESTION: 1

In an * ac* circuit,

Solution:

The correct answer is: 2.5

*Answer can only contain numeric values

QUESTION: 2

In the circuit shown below, the *ac* source has voltage V = 20cos(ωt) *Volts* with ω = 2000 the amplitude of the current (in *Amperes*) will be nearest to

Solution:

The correct answer is: 2

*Answer can only contain numeric values

QUESTION: 3

The power factor of a good choke coil is nearly.

Solution:

Power factor of a good choke coil is 0

The correct answer is: 0

*Answer can only contain numeric values

QUESTION: 4

A coil of 200Ω resistance and 1.0H inductance to an ac source of frequency 200/ 2π Hz. Phase angle (in degree) between potential and current will be

Solution:

The correct answer is: 45

*Answer can only contain numeric values

QUESTION: 5

When 100V D.C. is applied across solenoid a current of 1.0A flows in it. When 100 V A.C. is applied across the same coil the current drops to 0.5A. If the frequency of the A.C. source is 50Hz, the impedance (in Ω) of the solenoid is.

Solution:

The correct answer is: 200

*Answer can only contain numeric values

QUESTION: 6

In the figure shown, a current of 2A flows in the circuit. The impedance (in **Ω**) of the circuit is

Solution:

The correct answer is: 130

*Answer can only contain numeric values

QUESTION: 7

In an ac circuit the current is given by i = 0.5sin(314t + 60º)mA. The peak to peak value of current is (in mA).

Solution:

Peak to Peak value of current is 1*mA*

The correct answer is: 1

*Answer can only contain numeric values

QUESTION: 8

A steady dc current of 2.83*A* is flowing in a resistance wire. The *rms* value of the current (in *Amperes*) is :

Solution:

The *rms* value of the current is 2.83A

The correct answer is: 2.83

*Answer can only contain numeric values

QUESTION: 9

In series *LCR* circuit the voltage across R, L and C are shown in figure. The Voltage (in *Volts*) of applied source is :

Solution:

The correct answer is: 50

*Answer can only contain numeric values

QUESTION: 10

The power factor of *LCR* circuit at resonance is

Solution:

Power Factor of LCR circuit at resonance is 1

The correct answer is: 1

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