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Statement 1: Both dc and ac can be measu...

Statement 1: Both dc and ac can be measured by a hot wire instrument.
Statement 2: the hot wire instrument is based on the principle of magnetic effect of current.

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

Text Solution

Verified by Experts

The correct Answer is:
C
In both ac and dc, heat generated is proportional to the square of current. Polarity change of ac is immaterial in the case of heat generation. Hence they can be measured by hot wire instrument. Hence, the assertion is true.
Hot wire instruments are based on the principle of heating effect of current. Hence, the reason is false.
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