Question

20. Full safety is provided when insulation is provided with -
(a) fuse only
(b) earthing only
(c) fuse and earth wire both
(d) none of these
Answer.)
[WBS​

Answer 1

option c ...... ... ..... ...

Answer 2

Full safety is provided when insulation is provided with (c) fuse and earth wire both.

Electrical Fuse:

• A fuse is an electrical safety device used in electronics and electrical engineering that protects an electrical circuit against overcurrent.
• Its primary component is a metal wire or strip that melts when too much current travels through it, halting or interrupting the current flow.
• If a failure in an appliance causes too much current to flow, the fuse trips the circuit.
• If something goes wrong, this safeguards the wires and the appliance.
• The fuse comprises a bit of wire that readily melts.
• If the current flowing through the fuse is too high, the wire warms up and melts, breaking the circuit.

Earthing wire:

• Earthing is a technique used to protect yourself from electric shock.
• It accomplishes this by allowing a fault current to pass to earth via a route (a protective conductor).
• It also causes the protection device (either a circuit breaker or a fuse) to cut off the electric current to the faulty circuit.
• Earthing metallic equipment is required to protect consumers from severe electric shock.
• Electric appliances' metallic bodies are linked to earth wires, transferring any leakage of electric current to the ground.

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