| Assertion: Long disance transmission of A.C. is Carried out at extremely high voltage. |
| Reason: For image distance, voltage has to be large. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion ad 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: C
Solution :
The transmission is done at high voltage due to which current through the wire is reduced. By reduction in current corresponding dissipation of energy is also reduced (as\[H\propto {{I}^{2}}R\]). If transmission is done at low voltage then we have to use thick wire in order to reduce the dissipation of energy. This increases the cost of transmission lines wires. In order to reduce both energy dissipation and cost of transmission wire, transmission is done at high voltage by using step up transformer.
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