Select Chapter Topics: 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 $10{\mathrm{\pi }}^{2}$ $\mathrm{\Omega ,}$ then the total charge flowing through the coil during this time is:-

1.
2.
3.
4.  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 $\frac{dB}{dt}$. 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) $-\frac{dB}{dt}{\mathrm{\pi r}}^{2}$ $\mathrm{in}$ $\mathrm{loop}$ $1$ $\mathrm{and}-\frac{\mathrm{dB}}{\mathrm{dt}}{\mathrm{\pi r}}^{2}$ $\mathrm{in}$ $\mathrm{loop}$ $2$

(3) $-\frac{dB}{dt}{\mathrm{\pi r}}^{2}$ $\mathrm{in}$ $loop$ $1$ $and$ $zero$ $\mathrm{in}$ $\mathrm{loop}$ $2$

(4) $\frac{2dB}{dt}{\mathrm{\pi r}}^{2}$ $\mathrm{in}$ $loop$ $1$ $and$ $zero$ $\mathrm{in}$ $\mathrm{loop}$ $2$  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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Hints 