The magnetic potential energy stored in a certain inductor is \(25\) mJ, when the current in the inductor is \(60\) mA. This inductor is of inductance:
1. \(0.138\) H
2. \(138.88\) H
3. \(1.389\) H
4. \(13.89\) H

Subtopic:  Self - Inductance |
 68%
From NCERT
NEET - 2018
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A long solenoid of diameter 0.1 m has \(2 \times 10^4\) turns per meter. At the center of the solenoid, a coil of 100 turns and radius 0.01 m is placed with its axis coinciding with solenoid axis. The current in the solenoid reduces at a constant rate to 0 A from 4 A in 0.05 s. If the resistance of the coil is 10π2 Ω, then the total charge flowing through the coil during this time is:-

1. 16 μC
2. 32 μC
3. 16π μC
4. 32π μC
Subtopic:  Faraday's Law & Lenz Law | Mutual Inductance |
 56%
From NCERT
NEET - 2017
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A uniform magnetic field is restricted within a region of radius r. The magnetic field changes with time at a rate dBdt. Loop 2 of radius R is outside the region of magnetic field as shown in the figure. Then the emf generated is-

                  

(1) zero in loop 1 and zero in loop 2

(2) -dBdtπr2 in loop 1 and-dBdtπr2 in loop 2

(3) -dBdtπr2 in loop 1 and zero in loop 2

(4) 2dBdtπr2 in loop 1 and zero in loop 2

Subtopic:  Faraday's Law & Lenz Law |
 74%
From NCERT
NEET - 2016
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A long solenoid has \(1000\) turns. When a current of \(4~\mathrm{A}\) flows through it, the magnetic flux linked with each turn of the solenoid is \(4\times 10^{-3}\) Wb. The self-inductance of the solenoid is:
1. \(3\) H
2. \(2\) H
3. \(1\) H
4. \(4\) H
Subtopic:  Self - Inductance |
 87%
From NCERT
NEET - 2016
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh