| Directions: In the following questions, a statement of Assertion [A] is followed by a statement of Reason (R). Mark the correct choice as: |
| Assertion [A]: Magnetism is relativistic. |
| Reason (R): When we move along with the charge so that there is no motion relative to us, we find no magnetic field associated with the charge. |
A) Both Assertion [A] and Reason (R) are true and Reason (R) is the correct explanation of Assertion [A]
B) Both Assertion [A] and Reason (R) are true but Reason (R) is not the correct explanation of Assertion [A]
C) Assertion [A] is true but Reason (R) is false
D) Assertion [A] is false and Reason (R) is also false
Correct Answer: A
Solution :
(a) A magnetic field is produced by the motion of electric charge. Since motion is relative, the magnetic field is also relative.
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