JEE Main 2020 — Electromagnetic Induction Question with Solution
From: JEE Main 2020 (Online) 3rd September Morning Slot
Question
An elliptical loop having resistance R, of semi major axis a, and semi minor axis b is placed in
magnetic field as shown in the figure. If the loop is rotated about the x-axis with angular frequency
, the average power loss in the loop due to Joule heating is :
This question includes a diagram. The text above accompanies the figure.
Choose an option
Show full solutionCorrect option: C
Correct answer
C
Step-by-step explanation
= BAcos
= BAcos()
We know, = =
Power (P) =
Pav =
= [As A = ab]
= BAcos()
We know, = =
Power (P) =
Pav =
= [As A = ab]
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