Electric Bulb

Q. Electric bulb was invented by ______.

1. Thomas Alva Edison
2. Albert Einstein
3. Isaac Newton
4. Louis Pasteur

Q. Which gas is present in bulb

Q. Who was the scientists who invented bulbs

Q.

Which is the strongest metal in the world?

Q.

Question 6

Would the bulb glow after completing the circuit shown in Fig. if instead of safety pin we use an eraser?

Q.

Which of the two is good conductor of heat and electricity: sodium or chlorine.

Q.

Which memory device is generally made of semiconductor

1. RAM

2. Hard-disk

3. Floppy disk

4. Cd disk

Q.

Question 20

Boojho has a cell and a single piece of connecting wire. Without cutting the wire in two, will he be able to make the bulb glow? Explain with the help of a circuit diagram.

Q.

Name an object which is non luminous at room temperature but can be made luminous by heating.

Q.

What faults are common with inductors?

Q. Filament of a torch bulb is

1. A metal case.
2. Metal tip at the centre of the base
3. Two thick wires
4. A thin wire.

Q. Which of the following is invented by Thomas Alva Edison?

1. Cell
2. Switch
3. Bulb
4. Wire

Q. An electrical bulb has three terminals whereas an electric cell has two terminals.

1. False
2. True

Q.

The insulator used in the element of an electric iron is ______.

Q.

An electric iron is based upon the principle of

1. Heating effect of current

2. Chemical effect of current

3. Magnetic effect of current

4. None of these

Q.

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

1. filament

2. reflector

3. refractor

4. insulator

Q. If one of the two wires connected to an electric bulb is called 'Live wire', then what is the other one called?

1. Neutral wire
2. Fuse wire
3. Bulb wire
4. Flow wire

Q. Will the bulb glow in the circuit shown in Fig.? Explain. What can be done to light the bulb?

[5 MARKS]

Q. Why does the bulb stop glowing when the tungsten filament breaks ?

Q.

A soft iron piece in an electromagnet, on which an insulated copper wire is wound, is called,

1. Insulator

2. Stem

3. Core

Q.

Cooking vessels should be made of ______ conductors?

Q. Choose the correct statement:

1. Electric current can pass through a sheet of thermocol

2. When current flows through a circuit, the circuit is called open circuit

3. Electric current can flow through metals

4. An electric bulb has one terminal

Q. When electricity is passed through an immersion rod, .

1. thermostat melts
2. electrons flow
3. rod melts

Q.

Why do we use thin and long tungsten in the filament of an electric bulb?

Q. Semiconductors are used in the manufacture of transistors.

1. True
2. False

Q. In the given figure bulbs A and B are connected to the battery, and both the bulbs are glowing.

If bulb A is blown, then bulb B will stop glowing. State True / False.

1. False
2. True

Q. Which of the following materials was/were used by Edison as filaments in his electric bulb?

1. Copper
2. Bamboo
3. Cotton
4. Platinum

Q. Dear sir /ma'am
please tell about allesandro Volta who invented electric cell, also mention how the cell was successfully made atlast tin easy language simplest form actually because we have to make a project on this please send it to me in the simplest form and too quickly
Sorry for disturbing you as it is an urgent matter...

Q.

Why are coils made of copper?

Q.

Name of the scientist who invented electric bulb is ___________.