Measurement and Instrumentation
A moving iron ammeter produces a full scale torque of 240 μNm with a deflection of 120° at a current of 10 A. The rate of change of self induction (μH/radian) of the instrument at full scale is

 12.0 μH/radian.
 114.6 μH/radian.
 4.8 μH/radian.
 2.0 μH/radian.

ANSWER DOWNLOAD EXAMIANS APP

Measurement and Instrumentation
Assertion(A): A low power factor wattmeter has special constructional features to ensure accurate measurment. Reason(R): Extension of wattmeter range in DC circuit can be easily done by using current and potential transformer

 A is true R is false.
 Both A and R is true and R is not correct explanation of A.
 A is false R is true.
 Both A and R is true and R is correct explanation of A C.

ANSWER DOWNLOAD EXAMIANS APP