Electric currents and Its Effects

What is an electric fuse?

• A switch to turn open and close an electric circuit

• It's an Electromagnet

• A cell in an electric circuit

• A safety device used in an electric circuit

Explain the electric bell.

When we connect two cells to form a battery, we should connect the positive terminal to the ________ terminal of the cell

What is this?

• An electric bulb

• An electric fuse

• An electric lamp

• A switch

In an electric bell, the hammer strikes the gong because the gong is Magnetic.

• True

• False

The strength of an electromagnet depends on the number of turns of the wire. The more the turns, The more magnetic effect. Do you agree?

• Yes

• No

Who discovered the magnetic effect of electric current?

• Benjamin Franklin

• Thomas Edison

• Hans Christian Oersted

Answer explanation

Thomas Edison discovered the LIGHT BULB. But Hans Christian Oersted discovered the MAGNETIC EFFECT OF ELECTRIC CURRENT. Aren't they similar?

Mention a few uses of Electromagnets.

Is the MCB automatically operated?

• Yes

• No

Will the electric circuit flow if the switch in the circuit is open?

• Yes it will flow

• No it will not flow