Q. Working of safety fuses depends upon1. magnetic effect of the current2. chemical effect of the current3. magnitude of the current4. heating effect of the currentSelect the correct answer using the code given below.
A) 1, 2 and 3 only
B) 1, 2, 3 and 4
C) 4 only
D) 3 and 4 only
✔ Correct Answer: 3 and 4 only
Exam Insight
The working of safety fuses depends on the heating effect of the current. When the current exceeds a safe limit, the fuse melts due to heat generated, breaking the circuit.