Answer available
Class 12 · Physics · Electromagnetic Induction and Alternating Currents
Define the root mean square value of an alternating current and state its relation to the peak value.
3 marksMediumShort answer
Class 12 · ICSE · Physics
Electromagnetic Induction and Alternating Currents
Faraday's and Lenz's laws, self and mutual inductance, AC circuits, resonance, power factor and the transformer.
- Questions
- 6
- PYQs
- 0
- Topics
- 0
Syllabus mapping: ISC syllabus (CISCE)
Questions
6 questions in this chapter.
- Answer available
Class 12 · Physics · Electromagnetic Induction and Alternating Currents
A coil of 200 turns experiences a change of flux of 0.02 Wb in 0.1 s. Find the induced emf.
3 marksMediumNumerical
- Answer available
Class 12 · Physics · Electromagnetic Induction and Alternating Currents
Why is a transformer not usable with direct current, and what are eddy currents?
3 marksMediumShort answer
- Answer available
Class 12 · Physics · Electromagnetic Induction and Alternating Currents
What is the power factor of an a.c. circuit, and what is it in a purely inductive circuit?
3 marksMediumShort answer
- Answer available
Class 12 · Physics · Electromagnetic Induction and Alternating Currents
An LCR series circuit has L = 2 H and C = 8 μF. Find its resonant frequency.
3 marksMediumNumerical
- Answer available
Class 12 · Physics · Electromagnetic Induction and Alternating Currents
State Faraday's laws of electromagnetic induction and Lenz's law.
3 marksMediumShort answer