A long solenoid has 1000 turns. When a current of 4 A flows through it, the magnetic flux linked with each turn of the solenoid is 4 x 10-3 Wb. The self-inductance of the solenoid is:

1. 3 H

2. 2 H

3. 1 H

4. 4 H

Subtopic:  Self - Inductance |
 88%
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The current through a choke coil increases from zero to 6 A in 0.3 seconds and an induced emf of 30 V is produced. The inductance of the coil is:

1. 5 H 2. 2.5 H
3. 1.5 H 4. 2 H
Subtopic:  Self - Inductance |
 89%
From NCERT
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Current in a circuit falls from 5.0 A to 0.0 A in 0.1 s. If an average emf of 200 V is induced, the self-inductance of the circuit is:
1. 4 H
2. 2 H
3. 1 H
4. 3 H

Subtopic:  Self - Inductance |
 90%
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The back emf induced in a coil, when current changes from 1 ampere to zero in one milli-second, is 4 volts. The self-inductance of the coil is:

1. 1 H                  

2. 4 H

3. 103 H              

4. 4 × 103 H

Subtopic:  Self - Inductance |
 89%
From NCERT
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A coil of resistance 20 Ω and inductance 5 H has been connected to a 200 V battery. The maximum energy stored in the coil is:

1. 250 J 2. 125 J
3. 500 J 4. 100 J
Subtopic:  Self - Inductance |
 86%
From NCERT
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The current I in an inductance coil varies with time t according to the graph shown in the figure. Which one of the following plots shows the variation of voltage in the coil with time?

1.  2.
3. 4.
 

Subtopic:  Self - Inductance |
 81%
From NCERT
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A 10 H inductor carries a current of 20 A. How much ice at 0°C could be melted by the energy stored in the magnetic field of the inductor?
Latent heat of ice is  2.26 × 103 J/kg .

1. 0.08 kg 2. 8.8 kg
3. 0.88 kg 4. 0.44 kg
Subtopic:  Self - Inductance |
 78%
From NCERT
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The number of turns in a coil of wire of fixed radius & length is 600 and its self-inductance is 108 mH. The self-inductance of a coil of 500 turns will be:

1.  74 mH

2.  75 mH

3.  76 mH

4.  77 mH

Subtopic:  Self - Inductance |
 78%
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A coil is wound of a frame of rectangular cross-section. If the linear dimensions of the frame are doubled and the number of turns per unit length of the coil remains the same, then the self inductance increases by a factor of:

1. 6 2. 12
3. 8 4. 16
Subtopic:  Self - Inductance |
 75%
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Calculate the self-inductance of a solenoid having 1000 turns and length 1 m. The area of cross-section is 7 cm2 and \(\mu_r=1000\)

1. 888 H

2. 0.88 H

3. 0.088 H

4. 88.8 H

Subtopic:  Self - Inductance |
 71%
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