A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but reason is not the correct explanation of the assertion.
C) If assertion is true but reason is false.
D) If the assertion and reason both are false.
E) If assertion is false but reason is true.
Correct Answer: D
Solution :
An ac ammeter is constructed on the basics of heating effect of the electric current. Since heat produced varies as square of current \[(H={{I}^{2}}R)\]. Therefore the division marked on the scale of ac ammeter are not equally spaced.
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