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Question

Match the following:

Column A Column B

(a) Two like charges (i) negative charge

(b) Two unlike charges (ii) repel

(c) Silver is a (iii) insulator

(d) Silk is an (iv) attract

(e) Ebonite rod rubbed with fur acquires (v) conductor

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Solution

(a) Two like charges (ii) repel

(b) Two unlike charges (iv) attract

(c) Silver is a (v) conductor

(d) Silk is an (iii) insulator

(e) Ebonite rod rubbed with fur acquires (i) negative charge


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Q.

Select the correct alternative:

(a) when a glass rod is rubbed with the dry silk cloth, the charge acquired by the silk cloth is :

(i) positive

(ii) negative

(iii) both positive and negative

(iv) none of the above.

(b) When an ebonite rod is rubbed with fur,the rod acquires:

(i) positive charge

(ii) negative charge

(iii) no charge

(iv) none of the above.

(c) When a negatively charged body is brought closer to another negatively charged body, then they will show :

(i) attraction

(ii) no effect

(iii) repulsion

(iv) none of the above.

(d) Charging a conductor by bringing another charged conductor close to it without touching is called :

(i) induction (ii) conduction

(iii) convection (iv) radiation.

(e) The factor responsible for charging a conductor is :

(i) transfer of protons

(ii) transfer of neutrons

(iii) transfer of electrons

(iv) transfer of protons and electrons.

(f) Two objects when rubbed together get charged.The charges on them are:

(i) equal and opposite

(ii) equal and similar

(iii) unequal and similar

(iv) unequal and opposite

(g) When a glass rod is rubbed with silk,the glass rod and the silk get charged because:

(i) electrons are transferred from the silk to the glass rod

(ii) electrons are transferred from the glass rod to the silk.

(iii) protons are transferred from the silk to the glass rod.

(iv) protons are transferred from the glass rod to the silk.

(h) The conductor of electricity is :

(i) wood (ii) glass

(iii) ebonite (iv) human body

(i) A gold leaf electroscope is to be charged positively by conduction.For this:

(i) a positively charged rod is held close to near the disc of electroscope.

(ii) a positively charged rod is placed in contact with the disc of electroscope.

(iii) a negatively charged rod is held close to near the disc of electroscope.

(iv) a negatively charged rod is touched with the disc of electroscope.

(j) A glass rod rubbed with silk is touched with the disc of negatively charged gold leaf electroscope.The divergence of leaves will:

(i) decrease

(ii) increase

(iii) remain unchanged

(iv) first decreases and then increases.

(k) The rod in gold leaf electroscope is made up of:

(i) wood (ii) brass

(iii) glass (iv) ebonite

(l) Lighting conductor is made up of :

(i) copper (ii) glass

(iii) ebonite (iv) wood

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