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Name the Material Which is Used for Making the Filaments of an Electric Bulb. - Science

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प्रश्न

Name the material which is used for making the filaments of an electric bulb.

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उत्तर

Tungsten is used for making the filament of an electric bulb.

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अध्याय 1: Electricity - Exercise 8

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लखमीर सिंग Physics (Science) [English] Class 10
अध्याय 1 Electricity
Exercise 8 | Q 21.5

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संबंधित प्रश्न

An electric heater of resistance 8 Ω draws 15 A from the service mains 2 hours. Calculate the rate at which heat is developed in the heater.


Why are the conductors of electric heating devices, such as bread-toasters and electric irons, made of an alloy rather than a pure metal?


Why does the connecting cord of an electric heater not glow hot while the heating element does?


An electric fuse works on the:
(a) chemical effect of current
(b) magnetic effect of current
(c) lighting effect of current
(d) heating effect of current


Which of the following characteristic is not suitable for a fuse wire?

(a) thin and short
(b) thick and short
(c) low melting point
(d) higher resistance than rest of wiring


Which electric heating device in your home do you think have resistors which control the flow of electricity?


Give a scientific reason.

Tungsten metal is used to make a solenoid type coil in an electric bulb.


Give a scientific reason:

For electric power transmission, copper or aluminium wire is used.


Statement 1 : Electric current ( flow of electrons ) creates heat in the resistor.
Statement 2 : Heat in the resistor is created according to the rule of energy conservation.
Explain Statement 1 with the help of Statement 2.


The ‘live’ and the ‘neutral’ wires have potential difference of _______.


Explain the importance/uses of fuse wire.


An electric kettle consumes 1 kW of electric power when operated at 220 V. A fuse wire of what rating must be used for it?


An electric fuse has a body made of ceramic and two points for connecting the fuse wire.


Explain the working of an electric fuse.


An electrochemical cell converts ______ energy into ______ energy.


A fuse is used in an electric circuit to stop high currents flowing through the circuit.


Find the odd one out.


When a current I flows through a wire of resistance R for time t then the electrical energy produced is given by ______.


An electric iron of resistance 20 Ω draws a current of 5 A. The heat developed in the iron in 30 seconds is ______.


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