how is excess flow of current in a circuit prevented
Answers
Answer:
Bye keeping resistors
Answer:
Excessive flow of current in a circuit is prevented by using a fuse.
Explanation:
The electric fuse is a device which is used to limit the current in an electric circuit. It safeguards the circuit and appliances connected in the circuit from being damaged if the current in the circuit exceeds the specified value due to voltage fluctuations for short circuiting.
If the insulation on the wire of a cable used in wiring brakes, the live wire comes in contact with the neutral wire which results in a short circuit.Maximum current then passes through the wires which can cause burning of the fires due to excessive heat.
Similarly due to voltage fluctuations, sometimes high current flows through the wires that can cause burning of wires. To prevent this damage a fuse is connected to the live wire of circuit. When there is a short circuit the fuse wire get heated up to the extent that it melts as a result a gap is produced in the live wire and the circuit becomes incomplete or breaks.
No current then flows and appliances or the circuit is saved. After removing the fault in the circuit or the appliance a news fuse wire is fixed between the terminals T1 and t2 in the holder to complete the circuit again.
Hope this helps you.......