AP EAMCET · PHYSICS · Electromagnetic Induction
A circular coil has turns, radius and resistance . This coil is co-axial with a solenoid of turns/cm and diameter . If the solenoid current is decreased from to zero in , then the current induced in the coil is
- A
- B
- C
- D
Answer & Solution
Correct Answer
(A)
Step-by-step Solution
Detailed explanation
Magnetic field due to a solenoid is given by, B=μ0ni. Therefore, flux through the coil will be, ϕ=BA=μ0niNπr2. According to Faraday's law of electromagnetic induction ε=∆ϕ∆t. Therefore,…
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