Q1PhysicsUnit 14: Electromagnetic Induction and Alternating Currents
Which of the following is true in context
of Eddy currents?
Physics · JEE
Electromagnetic Induction and Alternating Currents Short Tricks for JEE
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Short tricks for Electromagnetic Induction and Alternating Currents work only with strong fundamentals. Apply the tips below in timed sets and review every explanation.
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Dimensional check first
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Limiting cases
Substitute extreme values (t→0, m→∞, θ→0) to sanity-check your final expression.
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6+ important formulas for Electromagnetic Induction and Alternating Currents
Subtopics in Electromagnetic Induction and Alternating Currents
- Electromagnetic induction: Faraday's law, induced emf and current, Lenz's law, eddy currents, self and mutual inductance
- Alternating currents, peak and RMS value of alternating current/voltage
- Reactance and impedance, LCR series circuit, resonance, power in AC circuits, wattless current
- AC generator and transformer
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Q2PhysicsUnit 14: Electromagnetic Induction and Alternating Currents
Choose the incorrect statement.
Q3PhysicsUnit 14: Electromagnetic Induction and Alternating Currents
An alternating voltage given as is applied to a
capacitor of . The current reading of
the ammeter will be equal to
Q4PhysicsUnit 14: Electromagnetic Induction and Alternating Currents
The average half-cycle value of a sine
wave with a peak is
Q5PhysicsUnit 14: Electromagnetic Induction and Alternating Currents
Which of the following statement
regarding transformer is incorrect?
Q6PhysicsUnit 14: Electromagnetic Induction and Alternating Currents
A circuit has a self-inductance of
and carries a current of To prevent sparking, when the circuit is switched off, a capacitor which can withstand
is used. The least capacitance of
the capacitor connected across the
switch must be equal to
Q7PhysicsUnit 14: Electromagnetic Induction and Alternating Currents
The input AC voltage to the transformer
is and output is . Then:
Q8PhysicsUnit 14: Electromagnetic Induction and Alternating Currents
A magnet is allowed to fall through a copper circular wire. Then during fall:
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Popular questions in Electromagnetic Induction and Alternating Currents
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