David Sang Solutions for Chapter: Electric Circuits, Exercise 7: End-of-chapter questions

A fuse can be used to protect an electrical circuit. What other device could be used to protect a circuit instead of a fuse?

A fuse can be used to protect an electrical circuit. Explain why a $13 \mathrm{A}$ fuse is suitable for a circuit in which the greatest current is usually $10 \mathrm{A}$.

Name the electrical component which stores energy in a circuit.

Name the electrical component in which resistance decreases when light shines on it.

Name the electrical component which acts as an electromagnetic switch.

An electric circuit is designed to carry a current of $10 \mathrm{A}$. What problem may arise if the current rises above this value?

An electric circuit is designed to carry a current of $10 \mathrm{A}$. Name two devices that could be fitted into the circuit to protect the circuit if the current becomes dangerously high.

An electric circuit is designed to carry a current of $10 \mathrm{A}$. If the circuit is required to carry a higher current, how should the wiring be changed? Explain your answer.