Science 1 Marks Question

The device used in these days in place of electric fuse is MCB (Miniature Circuit Breaker).

Electric fuse is required in all electrical appliances to prevent damage from excessive current flow or during short circuit.

When the current through the coil stops flowing, the coil does not remain an electromagnet.

Yes, if a large current passes through a wire, the wire may become hot and it may even melt and break.

Some of the electric appliances where the heating effect of the electric current is used are electric heater, geyser, micro-oven, room heater, boiler, etc.

The glowing electric bulb becomes warm. It happens due to heating effect of electric current.

If the filament of the bulb is broken, the circuit will not be complete. So, the bulb will not glow.

In the combination of cells, positive terminal of a cell is connected with the negative terminal of another cell and vice-versa.

Battery is a combination of two or more cells.

The heat produced in a wire depends on the current, resistance, and time.

A switch is used to open or close an electric circuit, allowing us to turn the current on or off.

The device used to open and close an electric circuit is a switch.

Electric fan and electrical motor are the electrical appliances in which electromagnets are used.

The scientist who discovered the magnetic effect of electric current is Hans Christian Oersted.

The devices that work on the basis of magnetic effects of current are loudspeaker and electric bell.

When too many devices get connected to a single socket, then a circuit is said to be overloaded.

The flow of the current in a circuit increases heavily at the time of short circuit.

ISI mark is the mark for which we should look at an electrical appliance before buying.