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Earn 100

Give the relation between drift velocity and current.

Important Questions on Electric Current

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Define the unit of current.
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Which of the following is a conductor?
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What are conductors? Give an example.
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Rubber or plastic is used for covering electrical wires. Why?
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State the differences between conductors and insulators. Give at least five examples for each.
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Electric current is measured by a device, called _____.
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Pure water is a good conductor of electricity.
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What is the difference between a direct current and an alternating current? How many times does AC used in India change direction in one second?
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Answer in one word.
Materials which allow the flow of electric current through them. (conductors/insulators)
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Conductors and insulators are equally important for us. Give reasons.

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All metals are good conductors of electricity.
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Differentiate between conductors and insulators.

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Electric current can easily flow through copper.
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Write the difference between conductors and insulators.
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What do we need to make a device which works on electricity?
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How will you show that an object is an electric conductor or an insulator?
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Match the following:
(a) Conductor (i) Save appliances
(b) Button cell (ii) Graphite
(c) Lead accumulator (iii) A combination of cells
(d) MCBs (iv) Secondary cell
(e) Battery (v) Used in wrist watches
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Metals have ______ resistance.
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Choose the odd one out.
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Why is it advised not to touch an electric switch, plug or device with wet hands?