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Resistors

An electric b...

Question

An electric bulb has a filament that is connected to its terminal.Is it true or false?

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Solution

Yes, thats true, because circuit has to be closed and complete.

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Similar questions

Q. Write True (T) or False (F) against the following statements in the given brackets:
1. Electricity in motion is called current electricity. ( )
2. Rubber is a good example of electric insulator. ( )
3. The base of an electric cell is its negative terminal. ( )
4. The supporting wire breaks in a fused bulb. ( )
5. Electric current can flow through metals. ( )
6. An electric cell two terminals. ( )
7. An electric bulb has a filament that is connected to its terminals. ( )
8. Instead of metal wires, a jute string can be used to make a circuit. ( )

State True or False. If false correct it.

(1) The SI unit of charge is volt.

(2) Voltmeter is always connected in series with the device.

(3) The conventional direction of flow of current is from positive terminal to negative terminal of the cell.

(4) Silver and copper are good conductors.

(5) Resistivity of pure metal is more than alloys.

(6) The electric bulb consists of the filament whose melting point is low.

Q. An incandescent light bulb has a tungsten filament that is heated to a temperature

3 \times 10^{3} K

when an electric current passes through it. If the surface area of the filament is approximately

10^{- 4} m^{2}

and it has an emissivity of

0.32

, the power radiated by the bulb is

Q. Why is the longer wire of an led bulb connected to the positive terminal of the cell or battery(why can't it be connected to the negative terminal)?

Q. An electric bulb is marked

200

100

W. Calculate electrical resistance of its filament. If five such bulbs are connected in series to a

200

V supply, how much current will flow through them?

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