A circular conducting coil of radius 1 {m} is being heated by the change of magnetic field \overrightarrow{{B}} passing perpendicular to the plane in which the coil is laid. The resistance of the coil is 2 \\mu\\Omega. The magnetic field is slowly switched off such that its magnitude changes in time as {B}=\frac{4}{\pi} \\times10^{-3} {T}(1-{{t}}/{100}) The energy dissipated by the coil before the magnetic field is switched off completely is {E}=──── {mJ} [25 Jul 2021 Shift 1]

JEE Main 25 July 2021 Shift 1 Solved Paper

Section: Physics

Question : 24 of 90

Marks: +1, -0

A circular conducting coil of radius 1m is being heated by the change of magnetic field

→

passing perpendicular to the plane in which the coil is laid. The resistance of the coil is 2µΩ. The magnetic field is slowly switched off such that its magnitude changes in time as
B=

×10−3T(1−

100

)
The energy dissipated by the coil before the magnetic field is switched off completely is E=──── mJ

[25 Jul 2021 Shift 1]

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