Search any question & find its solution
Question:
Answered & Verified by Expert
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.
Solution:
2604 Upvotes
Verified Answer
The correct answer is:
(D) only
An electric field varying linearly with time will not produce variable magnetic field as current will be constant.
A decelerating charged particle can result in a time varying magnetic field by emitting radiation.
Similarly a permanent magnet has a constant magnetic field and a direct current does not change its direction and cannot produce a magnetic field.
An antenna can modulate the digital signals .
So, the right option is the statement D.
Looking for more such questions to practice?
Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.