Question

How does overload and short-circuit occur in an electric circuit explain
What is the function of fuse during this situation ?
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Mention two properties of magnetic field lines
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Answer 1

Answer:

Explanation:

The over usage of electricity in a circuit more than its limit is called overload.

In other words, the rising of electric load in a circuit is called overload.

The connection of many electric wires to a single socket is called short circuit.

The function of fuse in these situations is to cut off the rising load. In this situation, the fuse wire which is low in electrical resistance, melts due to rising current and breaks the circuit.

I didn't knew the last answer. Sorry.

Answer 2

Overload and short-circuit occur the following way;

Overload occurs due to faults in the electrical devices.

• A malfunction in the electrical device can cause it to draw a large amount of current from the mains.
• This results in overloading.

Short-circuit occur due to faults in the electrical lines.

• Damaged insulation or the touching of electrical lines is the cause.
• As a result, resistance becomes zero leading to a current overflow.

The function of the fuse;

• A fuse acts as circuit breakers during an overload or short-circuit.
• It comprises a wire with a very low melting point.
• An overflow of current melts this wire thus breaking the circuit.

Two properties of magnetic field lines;

• These lines form closed loops without intersecting each other.
• A tangent drawn to these lines helps find the direction of the magnetic field.