Same chapter3 marksDifficulty: Medium
A coil of 200 turns experiences a change of flux of 0.02 Wb in 0.1 s. Find the induced emf.
Electromagnetic Induction and Alternating Currents
3 marksDifficulty: Medium
An LCR series circuit has L = 2 H and C = 8 μF. Find its resonant frequency.
Original Khojo Papers practice question — not from a past board paper.
Answer
About 39.8 Hz
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
f = 1/(2π√(LC)) = 1 ÷ (2π√(2 × 8 × 10−6)) = 1 ÷ (2π × 4 × 10−3) ≈ 39.8 Hz.
Related questions
From the same topic and chapter, at a similar level.
Same chapter3 marksDifficulty: Medium
What is the power factor of an a.c. circuit, and what is it in a purely inductive circuit?
Electromagnetic Induction and Alternating Currents
Same chapter3 marksDifficulty: Medium
State Faraday's laws of electromagnetic induction and Lenz's law.
Electromagnetic Induction and Alternating Currents
Same chapter3 marksDifficulty: Medium
Why is a transformer not usable with direct current, and what are eddy currents?
Electromagnetic Induction and Alternating Currents
Same chapter3 marksDifficulty: Medium
Define the root mean square value of an alternating current and state its relation to the peak value.
Electromagnetic Induction and Alternating Currents
Same subject3 marksDifficulty: Medium
State Kirchhoff's two laws and say what conservation principle each expresses.
Current Electricity