Alternating Current Test

Result

Alternating Current Test - 32

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

A straight conductor of length 0.4m is moved with a speed of 7ms^-1 perpindicular to magnetic field of induction 0.9 Wb/m². The induced e.m.f across the conductor is

A
25.2 V

B
5.04 V

C
2.52 V

D
1.26 V

Solution
Question 2
4 / -1

In an A.C. circuit, the current is i = 5 sin (100t - π/2) amp and the a.c. potential is V = 200 sin (100t) volt. Then, the power consumption is

A
200 watts

B
40 watts

C
1000 watts

D
0 watts

Solution
Question 3
4 / -1

A metal ring is held horizontally and bar magnet is dropped through the ring with its length along the axis of the ring. The acceleration of the falling magnet is

A
equal to g

B
less than g

C
more than g

D
depends on the diameter of ring and length of magnet
Question 4
4 / -1

A
zero

B
0.5 V₀I₀

C
0.707 V₀I₀

D
1.414 V₀I₀

Solution
Question 5
4 / -1

In the circuit shown in fig what will be the reading of the reading of the voltmeter?

A
300 V

B
900 V

C
200 V

D
400 V

Solution
Question 6
4 / -1

In the circuit shown in fig. what will be the readings of voltmeter and ammeter ?

A
800 V, 2A

B
220 V, 2.2 A

C
300 V, 2A

D
100 V, 2 A

Solution
Question 7
4 / -1

In a transformer, n_p = 500, n_s= 5000. Input voltage is 20 V and frequency is 50 Hz. Then in the output, we have

A
200V, 500Hz

B
200V,50 Hz

C
20 V,50 Hz

D
2V, 5 Hz

Solution
Question 8
4 / -1

In an ac circuit, with voltage V and current I the power dissipated is

A
VI

B

C

D
depends on the phase angle between V and I.

Solution
Question 9
4 / -1

Two coils have mutual inductance 0.005 H. The current changes in the first coil according to equation I = I₀ sin ωt where I₀ = 10 A and ω = 100 π rad/ sec. The maximum value of e.m.f in second coil is

A
2π

B
5π

C
π

D
4π

Solution
Question 10
4 / -1

For high frequency, capacitor offers

A
more resistance

B
less resistance

C
zero resistance

D
none of these

Solution