Which are the devices now replacing the electrical fuse?

Nowadays fuses have been largely replaced by circuit breakers, automatic switches with compressed springs that try to open them up and thus break the connection.

Which device is used instead of fuse?

Miniature Circuit Breakers (MCBs) are electromechanical devices which are used to protect an electrical circuit from an overcurrent. The lead reasons for an overcurrent could be a short circuit or overload. Unlike a Fuse, MCB does not have to be replaced every time after a fault occurs and it can be reused.

Why is an electric fuse required in all appliances?

Since the current in series remains the same, the fuse wire gets melted and breaks the circuit thereby protecting the appliance from getting damaged. Hence an electric fuse required in all electrical appliances for the protective reason of the appliance.

Is used instead of safety fuse in houses?

For domestic applications, Miniature circuit breakers (MCB) are widely used as an alternative to fuses.

What is fuse Why is it called safety device?

Answer:an electric fuse is called a safety device because it has the capability to protect an electric circuit from excessive electric current.

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Can a circuit breaker be used as a switch?

Circuit breakers may work more effective as safe switches, but they are not switches. They are not interchangeable. Therefore, using a circuit breaker as a switch is not recommended.

Why is an electric fuse required in all electrical appliance class 7?

Answer: a fuse is a device which has low melting point. So when high amount of current passes through it , due to heating effect if electric current, it melts and thus breaks the circuit to prevent the flow of electricity. As a result it prevents short circuit and saves the electrical appliance from damage.

Which is not correct in the case of an electric fuse?

Fuse is designed to limit the maximum current. There is a maximum limit of current above which the fuse blows and the circuit is broken. Option (c) – This is incorrect.

Why is a fuse used in an electrical circuit in a house?

The fuse breaks the circuit if a fault in an appliance causes too much current to flow. This protects the wiring and the appliance if something goes wrong. The fuse contains a piece of wire that melts easily. If the current going through the fuse is too great, the wire heats up until it melts and breaks the circuit.