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Electromagnetic Induction
JEE Physics • 10 questions • Free on ExamBattle
Practice Questions
Q1
According to Faraday's law, the magnitude of induced EMF is proportional to:
- A. Magnetic flux
- B. Rate of change of magnetic flux
- C. Magnetic field strength
- D. Area of the loop
Q2
Lenz's law is a consequence of conservation of:
- A. Charge
- B. Energy
- C. Momentum
- D. Mass
Q3
The self-inductance of a solenoid with N turns, length l, and area A is:
- A. μ₀NA/l
- B. μ₀N²A/l
- C. μ₀N²l/A
- D. μ₀NA²/l
Q4
The energy stored in an inductor of inductance L carrying current I is:
- A. LI
- B. ½LI²
- C. LI²
- D. ½L²I
Q5
In an AC circuit with only a pure inductor, the current lags the voltage by:
- A. 45°
- B. 90°
- C. 180°
- D. 0°
Q6
A coil of 100 turns has flux changing from 0.1 Wb to 0.3 Wb in 0.2 s. The induced EMF is:
- A. 10 V
- B. 100 V
- C. 200 V
- D. 50 V
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