| Assertion: The resistance of a coil for direct current is 5 ohms. An alternating current is sent, through it. The resistance will remain same. |
| Reason: The resistance of a coil dos not depend upon nature of current. |
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: D
Solution :
When an alternating current is sent through the coil then effective resistance of the coil will be \[\sqrt{{{R}^{2}}+{{\left( \omega L \right)}^{2}}}\]while it was only R for direct current i.e. effective resistance of coil will increase for A.C.
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