Electromagnetic Induction: NEET Physics Previous Year Questions

274 previous year questions from Electromagnetic Induction. Here are the 25 most important ones; open any question for the correct answer and a full step-by-step solution.

1. $A generator with a circular coil of 100 turns of area 2 \times 10^{- 2} m^{2} is immersed in a 0.01 T magnetic field and rotated at a frequency of\dots$
2. $If N is the number of turns in a circular coil then the value of self inductance varies as$
3. $A rectangular coil of 20 turns and area of cross‐section 25 sq . cm has a resistance of 100Ω . If a magnetic field which is perpendicular to the plane of\dots$
4. $A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If the current in the secondary coil is 6 A, the voltage across the\dots$
5. $If the number of turns per unit length of a coil of solenoid is doubled, the self‐ inductance of the solenoid will$
6. $A coil of resistance 400 Ω is placed in a magnetic field. If the magnetic flux ϕ (Wb) linked with the coil varies with time t (sec) as\dots$
7. $A uniform magnetic field of 0.4 T acts perpendicular to a circular copper disc 20 cm in radius. The disc is having a uniform angular velocity of\dots$
8. $The magnetic potential energy stored in a certain inductor is 25 mJ, when the current in the inductor is 60 mA . This inductor is of inductance$
9. $A transistor‐oscillator using a resonant circuit with an inductor L (of negligible resistance) and a capacitor C in seriesproduce oscillations of frequency f . If\dots$
10. $In an a . c . circuit with phase voltage V and current I, the power dissipated is$
11. $An inductor 20 mH, a capacitor 100 μF and a resistor 50Ω are connected in series across a source of emf, V = 10 sin 314 t . Th\dots$
12. $A small signal voltage V (t) = V_{0} sin ω t is applied across an ideal capacitor C$
13. $In a coil, the current changes from - 2 A to + 2 A in 0.2 s and induces an emf of 0.1 V . The self inductance of the coil is:$
14. $A long solenoid of diameter 0.1 m has 2 \times 1 0^{4} turn per meter. At the center of the solenoid, a coil of 100 turns and radius 0.01 m is placed with its axis coinciding\dots$
15. $A long solenoid has 1000 turns. When a current of 4A flows through it, the magnetic flux linked with each turn of the solenoid is 4 \times 1 0^{-3} Wb. The self-inductance of\dots$
16. $A coil has resistance 30 ohm and inductive reactance 20 ohm at 50 Hz frequency. If an ac source, of 200 volt, 100 Hz, is connected across the\dots$
17. $A conducting circular loop is placed in a uniform magnetic field, B = 0.025 T with its plane perpendicular to the loop. The radius of the loop is made to shrink at a cons\dots$
18. $A uniform magnetic field B exists in a direction perpendicular to the plane of a square loop made of a metal wire. The wire has a diameter of 4 mm and a total\dots$
19. $A metal loop of area 10 cm^{2} is placed in a region such that its area vector points along k . The region contains a uniform magnetic field of magnit\dots$
20. $For a series LCR circuit the power loss at resonance is$
21. $The magnetic potential energy stored in a certain inductor is 25 mJ then the current in the inductor is 60 mA. This inductor is of inductance$
22. $A 20 m long uniform copper wire held horizontally is allowed to fall under the gravity (g = 10 m / s^{2}) through a uniform horizontal magnetic field of 0.5 Gaus\dots$
23. $Two coils have a mutual inductance of 0.01 H . The current in the first coil changes according to equation I = 5 sin 200 πt . The maximum value of e.m\dots$
24. $Same current is flowing in two a.c. circuits. First contains only inductance and second contains only capacitance. If frequency of a.c. is increased for both, the current\dots$
25. $A conductor moving in the magnetic field B and the induced current is I . If the magnetic field is doubled the induced current will$

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Electromagnetic Induction: NEET Physics Previous Year Questions

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