MCB

Q.

MCB (Miniature Circuit Breakers) can be used to replace a fuse in the domestic electric circuit.

1. True

2. False

Q.

MCB automatically switches off the electrical circuit in an overload condition.

1. True

2. False

Q. Give scientific reason. The copper wire used in an electromagnet is insulted. I want short answer in 11 To 12 lines.

Q.

An MCB can be used instead of a fuse in an electric circuit

1. True
2. False

Q. Working of a tesla coil

Q.

What is a miniature circuit breaker?

Q. Circuit Breaker Device which can be used in place of fuse in domestic electric wiring is called:

(a) CBD
(b) DCB
(c) MCD
(d) MCB

Q.

How MCBs prevent the damage of household electric items?

1. By increasing the current in the circuit

2. By breaking the circuit, thus stopping the current

3. By keeping the current in the circuit constant

4. By decreasing the current in the circuit

Q. An MCB works on the principle of ___ effect of electric current.

1. chemical
2. heating
3. magnetic
4. gravitational

Q.

Miniature circuit breakers act as safety devices.

1. True
2. False

Q. Fuse wires of miniature circuit breakers are not used in a circuit containing electric cells. Why?

Q.

Miniature Circuit Breakers work on the principle of ___.

1. chemical effect of current

2. heating effect of current

3. magnetic effect of current

4. destruction of energy