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

(a) Conductor - (ii) Graphite Materials that allow electricity to pass through them easily are called conductors. Graphite is an example of conductor. It is the only non-metal which is a conductor. (b) Button cell - (v) used in wristwatches Cells are devices that convert chemical energy into electrical energy. Button cells are primary cells. They are used in wristwatches. (c) Lead accumulator - (iv) Secondary cell Lead accumulator is an example of a secondary cell. Secondary cells are also known as rechargeable cells as they can be used again even after all the chemicals are used up. (d) MCBs - (i) save appliances A device known as a fuse is connected in the circuit for safety purpose. When the current in the circuit exceeds the safe limit, it causes overheating of the wire. As a result, the fuse melts and breaks the circuit and thus saves the appliances. Nowadays, the fuse has been replaced by MCBs (Miniature Circuit-Breakers). (e) Battery - (iii) A combination of cells Some devices need more energy to function than that provided by a single cell. In such cases, two or more dry cells are placed in such a manner that the positive terminal of one cell remains in contact with the negative terminal of the other cell. Such a combination of cells is called a battery. (a) Conductor (ii) Graphite (b) Button cell (v) Used in wristwatches (c) Lead accumulator (iv) Secondary cell (d) MCBs (i) Save appliances (e) Battery (iii) A combination of cells

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Wood is a substance.

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Important Questions on Electricity and Circuits

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Science>Physics>Electricity and Circuits>Electric Conductors and Insulators

Why are metals good conductors of electricity whereas glass is a bad conductor of electricity? Give reason.

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Science>Physics>Electricity and Circuits>Electric Conductors and Insulators

Choose the odd one out.

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Science>Physics>Electricity and Circuits>Electric Conductors and Insulators

Does air conduct electricity?

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Science>Physics>Electricity and Circuits>Electric Conductors and Insulators

Answer in one word.
The insulating material used to make gloves.

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Science>Physics>Electricity and Circuits>Electric Conductors and Insulators

The statements given below are incorrect. Write the correct statements.

$3 .$ Mica is an example of a good conductor of electricity.

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Science>Physics>Electricity and Circuits>Electric Conductors and Insulators

Which of the following is a conductor?

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Science>Physics>Electricity and Circuits>Electric Conductors and Insulators

Electric wires are covered with _____ (plastic layer/ metal layer).

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Science>Physics>Electricity and Circuits>Electric Conductors and Insulators

Wood is an _____ material.

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Science>Physics>Electricity and Circuits>Electric Conductors and Insulators

Cross the odd one out. Give reasons to your choices.

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Science>Physics>Electricity and Circuits>Electric Conductors and Insulators

Why is it advised not to touch an electric switch, plug or device with wet hands?

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Science>Physics>Electricity and Circuits>Electric Conductors and Insulators

Electric current can easily flow through copper.

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Science>Physics>Electricity and Circuits>Electric Conductors and Insulators

$1 .$ Name two electric devices which are used for $(a)$ cooking.

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Science>Physics>Electricity and Circuits>Electric Conductors and Insulators

Which of the following will not allow the current to flow through it?

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Science>Physics>Electricity and Circuits>Electric Conductors and Insulators

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