Young's double slit: fringe width β = λD/d. If d doubled, β becomes: MCQ with Answer and Explanation
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The slope of a velocity-time graph gives
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A car of mass 1000 kg moves with velocity 20 m/s. Kinetic energy is
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Electromagnetic induction basis for:
Correct Answer: Option D
Explanation:
Induction (changing flux ⇒ EMF): generators (motion ⇒ electricity), transformers (AC voltage conversion). Motors use reverse principle (force on current in field). Memory aid: 'Induction: generators, transformers; motors: Lorentz force'. Device principle frequently tested in competitive electromagnetism sections.
Induction (changing flux ⇒ EMF): generators (motion ⇒ electricity), transformers (AC voltage conversion). Motors use reverse principle (force on current in field). Memory aid: 'Induction: generators, transformers; motors: Lorentz force'. Device principle frequently tested in competitive electromagnetism sections.
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