| Assertion: On moving a straight wire of copper in a uniform magnetic field cutting then lines of force, an e.m.f. is induced between the ends of the wire. |
| Reason: The Lorentz force acts on the free electrons of copper wire when moved in magnetic field. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true and reason is not the correct explanation of assertion.
C) if assertion is true but reason is false.
D) If both assertion and reason are false.
E) If assertion is false but reason is true.
Correct Answer: A
Solution :
Lorentz force exerts on the free electrons in the wire shifts them towards one end of the wire. As a result of this, one of the wire gets negatively charged while the other gets equally positively charged.
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