Physics · Electrical energy and power, electrical resistivity and conductivity
Fuse blows because
Fuse blows because
- A. There is a high voltage connected across the circuit
- B. There is a high current flowing through the circuit
- C. There is a high charge that has passed through the circuit
- D. The effective resistance of the circuit is too high
Step-by-step solution
A fuse is designed to melt and break the circuit when the current exceeds its rated value, due to the heat generated by high current. High voltage alone does not directly blow a fuse unless it causes excessive current. High charge passed (current integrated over time) is related, but the immediate cause is the current magnitude. High resistance reduces current, so it does not cause the fuse to blow.
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