NEET Physics / AI question bank / NCERT Class 12 / Electromagnetic Induction and Alternating Currents
Electromagnetic Induction: NEET questions with solutions
NEET tests Faraday's law with the flux changed by B, area or angle, Lenz's law for direction, motional emf Blv and the rotating rod ½BωR², self and mutual inductance with stored energy ½LI², and the ac generator's emf NBAω sin ωt. Marks are lost by forgetting N, by using the plane's angle instead of the normal's, by dropping the ½ for a rotating rod, and by expecting an emf from a steady field.
Also called: EMI · Faraday's law · Lenz's law · inductance
Questions
10 questions / answers after you pick
- Q1A flat coil of 200 turns, each of area 0.050 m², lies with its plane perpendicular to a uniform magnetic field. The field rises steadily…
Faraday's law of inductionEasySingle correct
- Q2The N pole of a bar magnet is pushed towards a closed circular wire loop along the loop's axis. As seen from the magnet's side, what is the…
Lenz's law and conservation of energyEasySingle correct
- Q3A metal rod of length 0.50 m slides at a constant 4.0 m s⁻¹ along two frictionless horizontal rails joined by a 2.0 Ω resistor. A uniform…
Motional emfMediumSingle correct
- Q4A metal rod of length 0.80 m rotates at 10 revolutions per second about an axis through one end, perpendicular to the rod. A uniform field…
Rotating rods and wheelsMediumSingle correct
- Q5An air-cored solenoid 40 cm long has 400 turns and a cross-sectional area of 5.0 cm². How much magnetic energy is stored in it when it…
Self-inductance and magnetic energyMediumSingle correct
- Q6A coil-design worksheet lists four claims about self and mutual inductance. Pick the option that names every correct claim.
Mutual inductanceMediumStatement based
- Q7A coil of 100 turns, each of area 0.020 m², rotates at 50 revolutions per second about an axis perpendicular to a uniform field of 0.10 T.…
AC generatorHardSingle correct
- Q8A bar magnet is dropped, N pole first, along the axis of a fixed horizontal copper ring. Read the Assertion (A) and Reason (R) and choose…
Lenz's law and conservation of energyMediumAssertion–Reason
- Q9A coil of 50 turns, each of area 0.010 m², has total resistance 4.0 Ω and is connected in a closed circuit. It lies with its plane…
Magnetic fluxHardSingle correct
- Q10Match each expression in List I with what it gives in List II.
Faraday's law of inductionEasyMatch the following
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