Joule Heating

Q. What happens when the filament of a bulb connected in a circuit fuses?

1. The current in the circuit increases leading to the damage of the remaining part of the circuit.
2. It leads to the heating of the battery source.
3. The flow of the current in the circuit stops suddenly.
4. The fusing of a bulb is nothing but the glowing of the bulb at maximum intensity.

Q.

How does use of a fuse wire protect electrical appliances?

Q. Select the phenomenona that depends on heating effect of current.

1. Deflection of a needle
2. Glowing of an incandescent bulb
3. Melting of a wire
4. Working of a motor

Q. Which of the following devices work on the heating effect of electric current?

1. Fan
2. Radio
3. Geyser
4. Phone
5. Bulb
6. Oven
7. Switch
8. Electric iron
9. Cell
10. Toaster