Torch Light

Q.

Name the element used as filament in electric bulb?

Q.

The thin wire that gives off light in a bulb is known as ___ .

Q. Which of the following is the part of an electric bulb that emits light?

1. Filament
2. Metal base
3. Glass bulb
4. Core

Q. When we pass electric current through the bulb it glows, the bulb glows due to ___________

1. Lighting effect of current

2. Electric effect of current

3. Heating effect of current

4. Glowing effect of current

Q.

Why CFL is considered better than filament based electric bulb?

Q. Which part of an electric bulb emits light? Explain with the help of a diagram.

Q.

What is the heating effect of electric current? Give few real-life examples where it is used.

Q. When we pass electric current through the bulb, it glows; the bulb glows due to ___________

1. Electric effect of current

2. Heating effect of current

3. Glowing effect of current

4. Lighting effect of current

Q. A thin wire that emits light in a bulb is known as .

1. insulator
2. reflector
3. filament

Q. Which of the following is the most efficient light source?

1. Option D
2. Option B
3. Option C
4. Option A

Q. Which part of an incandescent bulb gets heated first?

1. Filament
2. Inert gas
3. Glass case
4. Holder

Q. Which of them contains an electrical circuit within it?

1. Torch
2. Battery
3. Bulb
4. Cell

Q. Which kind of bulb is more efficient in saving electrical energy?

1. CFL
2. LED
3. FTL
4. IEB

Q. There are a , number of devices in common use that change energy from one form to another. Name some devices that change.
electrical energy into light energy

Q. Nayana has set up an electric circuit using some connecting copper wires, a battery, a switch and a bulb that she has taken from a torch light. But after connecting the equipments, the bulb is not glowing. What can be the reason(s) for this?

1. The bulb's filament is broken.
2. The circuit which should be closed is open instead.
3. The battery is dead.
4. Torch light bulbs cannot be used for this experiment.

Q. Nayana has set up an electric circuit using some connecting copper wires, a battery, a switch and a bulb that she has taken from a torch light. But after connecting the equipments, the bulb is not glowing. What can be the reason(s) for this?

1. The bulb's filament is broken.
2. The circuit which should be closed is open instead.
3. The battery is dead.
4. Torch light bulbs cannot be used for this experiment.

Q. A thin wire that emits light in a bulb is known as .

1. insulator
2. filament
3. reflector

Q. Which part of an incandescent bulb gets heated first?

1. Inert gas
2. Glass case
3. Holder
4. Filament

Q.

A thin wire that emits light in a bulb is known as _____.

1. insulator

2. filament

3. reflector

4. refractor

Q. Nayana has set up an electric circuit using some connecting copper wires, a battery, a switch and a bulb that she has taken from a torch light. But after connecting the equipments, the bulb is not glowing. What can be the reason(s) for this?

1. Torch light bulbs cannot be used for this experiment.
2. The battery is dead.
3. The circuit which should be closed is open instead.
4. The bulbs filament is broken.