Electro Magnetic Induction And Alternating Currents Question 121
Question: Assertion : The dc and ac both can be measured by a hot wire instrument. Reason : The hot wire instrument is based on the principle of magnetic effect of current.
Options:
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.
Show Answer
Answer:
Correct Answer: C
Solution:
Both ac and dc produce heat, which is proportional to square of the current. The reversal of direction of current in ac is immaterial so far as production of heat is concerned.
