JEE MAIN - Physics (2023 - 13th April Morning Shift - No. 8)
The source of time varying magnetic field may be
(A) a permanent magnet
(B) an electric field changing linearly with time
(C) direct current
(D) a decelerating charge particle
(E) an antenna fed with a digital signal
Choose the correct answer from the options given below:
(D) only
(A) only
(B) and (D) only
(C) and (E) only
Explanation
Source of time varying magnetic field may be
$\rightarrow$ accelerated or retarded charge which produces varying electric and magnetic fields.
$\rightarrow$ An electric field varying linearly with time will not produce variable magnetic field as current will be constant
$\rightarrow$ accelerated or retarded charge which produces varying electric and magnetic fields.
$\rightarrow$ An electric field varying linearly with time will not produce variable magnetic field as current will be constant
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