मराठी

Which of the Following Are Conductors and Which Are Insulators? Sulphur, Silver, Copper, Cotton, Aluminium, Air, Nichrome, Graphite, Paper, Porcelain, Mercury, Mica, Bakelite, Polythene, Manganin.

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प्रश्न

Which of the following are conductors and which are insulators?

Sulphur, Silver, Copper, Cotton, Aluminium, Air, Nichrome, Graphite, Paper, porcelain, Mercury, Mica, Bakelite, Polythene, Manganin.

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उत्तर

Conductors: silver, copper, aluminium, nichrome, graphite, manganin, mercury
Insulators: cotton, air, paper, porcelain, mica, bakelite, polythene, sulphur

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पाठ 4: Electricity - Exercise 1

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लखमीर सिंह Physics [English] Class 10
पाठ 4 Electricity
Exercise 1 | Q 12

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्‍न

On what factors does the resistance of a conductor depend?


A copper wire has diameter 0.5 mm and resistivity of 1.6 × 10−8Ω m. What will be the length of this wire to make its resistance 10 Ω? How much does the resistance change if the diameter is doubled?


List the factors on which the resistance of a conductor in the shape of a wire depends.


Why are alloys commonly used in electrical heating devices? Give reason.


What is the general name of the substances having infinitely high electrical resistance?


 What is meant by the "resistance of a conductor" ? Write the relation between resistance, potential difference and current.


 What happens to the resistance as the conductor is made thinner?


Which among iron and mercury is a better conductor of electricity?


Which has more resistance:    

 a thick piece of nichrome wire or a thin piece?


How does the resistance of a conductor depend on: 

 area of cross-section of the conductor?


How does the resistance of a conductor depend on: 

 temperature of the conductor?


How does the resistance of a wire change when: 

its material is changed to one whose resistivity is three times?


Calculate the area of cross-section of a wire if its length is 1.0 m, its resistance is 23 Ω and the resistivity of the material of the wire is 1.84 × 10−6 Ω m.


Write the relation between resistance and electrical resistivity of the material of a conductor in the shape of a cylinder of length `'l'`  and area of cross-section `'A'` . Hence derive the S.I. unit of electrical resistivity.


Materials which allow larger currents to flow through them are called:


The element used almost exclusively for filaments of incandescent lamps:


The effective resistance between A and B is:


A cylindrical conductor of length l and uniform area of cross-section A has resistance R. Another conductor of length 2l and resistance R of the same material has an area of cross-section:


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