Tungsten is used for the manufacture of an electric bulb because

Which of the following does NOT contain a heating element?

1. Electric oven
2. Electric bell
3. Electric heater
4. Electric iron

What are the factors upon which the amount of heat produced in a wire depends?
(i) Material
(ii) Length
(iii) Thickness

1. Only (i) and (ii)
2. (i), (ii) and (iii)
3. Only (ii) and (iii)
4. Only (i) and (iii)

Select the one in which the heating effect of current is not used.

1. Electric geyser
2. Electric iron
3. A battery
4. Electric immersion heater

Identify the element that is used for making the filament in bulbs.

1. Copper
2. Tungsten
3. Aluminum
4. Silver

A fuse is fixed in a circuit to

1. Increase the amount of current
2. Increase the power consumed in the circuit
3. Safeguard against excessive current
4. Decrease the amount of current

Which of the following effects of electric current is made use of in the figure shown below?

1. Heating
2. Magnetic
3. Chemical
4. All of these

The wire used in a fuse has

1. Average melting point
2. Low melting point
3. High melting point
4. All of these

A device that breaks the electric circuit in the case of excess current is called

1. Switch
2. Earth wire
3. Fuse wire
4. Voltmeter

Choose the correct statement about an electric fuse.

1. Fuses are an important part of all electrical appliances.
2. A maximum limit on the flow of an electric current in an electric circuit  is fixed.
3. A minimum limit on the flow of an electric current in an electric circuit is fixed. 
4. A fuse blows off if the current exceeds the safe limit.

DIRECTIONS: Read the following two statements carefully and choose the correct options.
Statement 1: The heating up of a thin conducting wire on passing an electric current through it is called the heating effect of current.
Statement 2: Various electrical appliances that are based on the heating effect of current contain a coil of wire called an element.

1. Statement (2) is correct, while statement (1) is incorrect.
2. Both statements are correct.
3. Statement (1) is correct, while Statement (2) is incorrect.
4. Both statements are incorrect.

In which one of the following conditions the amount of heat produced in a current-carrying wire will increase?

1. When terminals of are changed
2. When the amount of current passing in the wire is increased
3. When the amount of current passing in the wire is decreased
4. All of these

When current is passed through a conductor, the heat produced in it depends upon
I. The material of the conductor
II. The current flowing through the conductor
III. The time for which the current flows

1. I and II only
2. I and III only
3. II and III only
4. All I, II, and III

Which has no importance for fuse wire?

1. Current passing through the wire
2. Specific resistance of the wire
3. Length of wire
4. Diameter of wire

The given images show a

1. Battery
2. Cell
3. Switch
4. Plug

In which of the following circuits bulb will glow?