Assertion : A step-up transformer changes a low voltage into a high voltage.
Reason : This violate the law of conservation of energy.

Options

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true and R is NOT the correct explanation of A.
C. A is true but R is false
D. A is false and R is true

Answer

C

Explanation

Step-up transformer means it converts input law AC voltage to output high AC voltage. So, the assertion is true.
For step up transformer, `V_("OUT")//V_("IN") gt 1`, but simultaneously `I_("OUT")//I_("IN") lt 1` and `P_("IN") = P_("OUT")` (ideally). Hence, the law of conservation of energy is not violated.