2018 · Q11
Working of safety fuses depends upon
- 1magnetic effect of the current.
- 2chemical effect of the current.
- 3magnitude of the current.
- 4heating effect of the current.
Select the correct answer using the code given below:
General KnowledgePhysics
- A1, 2, 3 and 4
- B1, 2 and 3 only
- C3 and 4 only
- D4 only
Explanation
A fuse wire melts and breaks the circuit when the current exceeds a safe value, which is the heating effect of electric current. Its working therefore depends on the magnitude of the current and on the heating effect. The magnetic and chemical effects of current play no part in a safety fuse. Hence the answer is 3 and 4 only.