Which of the following instruments can be used to measure current in an a.c circuit?
A
Hot wire ammeter
B
Moving coil ammeter
C
Tangent galvanometer
D
Moving coil galvanometer
Verified Correct Answer: A.
Physical Principles & Numerical Solution
A hot wire ammeter measures current by detecting the heating effect produced when current passes through a thin wire, with the amount of heat generated being directly proportional to the current flow.
Source: Myschool Past Questions Archive (Record #44727)