EASY
Earn 100

What is the relation between electrical conductivity and electrical resistivity?

Important Questions on Electricity

EASY
Science>Physics>Electricity>Electric Conductivity and Electric Resistivity

What is a conductor of electricity? Give two examples.

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Science>Physics>Electricity>Electric Conductivity and Electric Resistivity
How does an increase in the temperature affect the specific resistance of a metal?
MEDIUM
Science>Physics>Electricity>Electric Conductivity and Electric Resistivity
What are conductors? Give two examples.
MEDIUM
Science>Physics>Electricity>Electric Conductivity and Electric Resistivity
How does an increase in the temperature affect the specific resistance of a Semiconductor?
EASY
Science>Physics>Electricity>Electric Conductivity and Electric Resistivity
Why are metals good conductors of electricity whereas glass is a bad conductor of electricity? Give reason.
EASY
Science>Physics>Electricity>Electric Conductivity and Electric Resistivity
Pure water is a good conductor of electricity.
MEDIUM
Science>Physics>Electricity>Electric Conductivity and Electric Resistivity
Why should an electrician use rubber gloves while repairing an electric switch at your home?
MEDIUM
Science>Physics>Electricity>Electric Conductivity and Electric Resistivity
Distinguish between conductors and insulators of electricity.
MEDIUM
Science>Physics>Electricity>Electric Conductivity and Electric Resistivity
Why are joints in electrical wires covered with plastic tapes?
EASY
Science>Physics>Electricity>Electric Conductivity and Electric Resistivity
Cross the odd one out. Give reasons to your choices.
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Science>Physics>Electricity>Electric Conductivity and Electric Resistivity
Why is it advised not to touch an electric switch, plug or device with wet hands?
EASY
Science>Physics>Electricity>Electric Conductivity and Electric Resistivity

Conductors and insulators are equally important for us. Give reasons.

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Science>Physics>Electricity>Electric Conductivity and Electric Resistivity
Write the difference between conductors and insulators.
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Science>Physics>Electricity>Electric Conductivity and Electric Resistivity

Why are electric wires made of metals?

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Science>Physics>Electricity>Electric Conductivity and Electric Resistivity
Which of the following is a conductor of electricity?
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Science>Physics>Electricity>Electric Conductivity and Electric Resistivity
What do we need to make a device which works on electricity?
MEDIUM
Science>Physics>Electricity>Electric Conductivity and Electric Resistivity

Can the handles of the tools like screwdrivers and pliers used by electricians for repair work are covered with thin aluminium foil instead of plastic or rubber? Explain it.

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Science>Physics>Electricity>Electric Conductivity and Electric Resistivity
Name any four insulators.
MEDIUM
Science>Physics>Electricity>Electric Conductivity and Electric Resistivity

Match the Columns:

  Column A   Column B
(a) Insulator (i) Copper
(b) Make and break circuit (ii) Dry cell
(c) Gas filled in an electric bulb (iii) Plastic
(d) Used in electric wires (iv) Switch
(e) Source of electric current (v) Argon
EASY
Science>Physics>Electricity>Electric Conductivity and Electric Resistivity

Silver is the best conductor of electricity. Why do you think electric wires are then made out of copper or aluminium?