Which of the following measuring instruments operates based on the heating effect of electric current?
A
moving iron ammeter
B
hot wire ammeter
C
galvanometer
D
electric heater
Verified Correct Answer: B.
Physical Principles & Numerical Solution
Hot wire ammeters measure current by detecting the heat produced in a wire due to the electric current flowing through it.
Source: WAEC / JAMB / NECO Classroom Archive (Record #70674)