Electromagnetic Induction Test

Result

Electromagnetic Induction Test - 65

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

The self-inductance of a straight conductor is

A
Zero

B
Very large

C
Infinity

D
Very small

Solution
Question 2
4 / -1

What is the coefficient of mutual inductance when the magnetic flux changes by 2 × 10^–2 Wb and change incurrent is 0.01 A

A
2 henry

B
3 henry

C

D
Zero

Solution
Question 3
4 / -1

A varying current at the rate of 3A/s in a coil generates an e.m.f. of 8 mV in a nearby coil. The mutual inductance of the two coils is

A
2.66 mH

B
2.66 ×10^–3 mH

C
2.66 H

D
0.266 H

Solution
Question 4
4 / -1

If a current of 10 A flows in one second through a coil, and the induced e.m.f. is 10 V, then the self-inductanceof the coil is

A

B

C

D
1 H

Solution
Question 5
4 / -1

The inductance of a solenoid 0.5 m long of cross-sectional area 20 cm² and with 500 turns is

A
12.5 mH

B
1.25 mH

C
15.0 mH

D
0.12 mH

Solution
Question 6
4 / -1

The equivalent inductance of two inductances is 2.4 henry when connected in parallel and 10 henry when connected in series. The difference between the twoinductances is

A
2 henry

B
3 henry

C
4 henry

D
5 henry

Solution
Question 7
4 / -1

An average induced e.m.f. of 1 V appears in a coil when the current in it is changed from 10 A in one direction to 10 A in opposite direction in 0.5 sec. Self-inductance of the coils is

A
25 mH

B
50 mH

C
75 mH

D
100 mH

Solution
Question 8
4 / -1

A coil of resistance 10 Ω and an inductance 5 H is connected to a 100 volt battery. Then energy stored in the coil is

A
125 erg

B
125 J

C
250 erg

D
250 J

Solution
Question 9
4 / -1

If a change in current of 0.01 A in one coil produces a change in magnetic flux of 1.2 × 10^–2 Wb in the other coil, then the mutual inductance of the two coils inhenry is

A
0

B
0.5

C
1.2

D
3

Solution
Question 10
4 / -1

Two coils of self-inductances 2 mH and 8 mH are placed so close together that the effective flux in one coil is completely linked with the other. The mutualinductance between these coils is

A
4 mH

B
16 mH

C
10 mH

D
6 mH

Solution