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When a glass rod is rubbed with a piece ...

When a glass rod is rubbed with a piece of silk cloth the rod

A

and the cloth both acquire positive charge

B

becomes positively charged while the cloth has a negative charge

C

and the cloth both acquire negative charge

D

becomes negatively charged while the cloth has a positive charge.

Text Solution

Verified by Experts

The rod becomes positively charged while the cloth has a negative charge.
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Explore conceptually related problems

When a glass rod is rubbed with silk cloth, the glass rod is found to acquire 9 xx 10^(-15) C. Calculate the amount of charge in the silk cloth.

Akshay and Sauranh are the students of class IX. They have recently studied the chapter on structure of atom in the class. Both Akshy and Saurabh were performing some activities in the science laboratory. Akshy took a plastic comb and rubbed it in his dry hair. When he brought this plastic comb (rubbed in dry hair) near tiny pieces of paper, the comb attracted the pieces of paper towards it. Mean while, Saurabh took a glass rod and rubbed it with a piece of silk cloth. When he brought this glass rod (rubbed with silk cloth) near the tiny pieces of paper, the glass rod also attracted the pieces of paper towards it (just like the plastic comb). Akshy and Saurabh had studied an instrument called electroscope in class VIII. So, they decided to make use of a positively charged electroscope having diverged leaves (or opened up leaves) in their activity. Akshy took the plastic comb (rubbed in dry hair) and touched the metal top of positively charged electroscope with it. This made the diverged leaves of electroscope to fold up. Saurabh then tool the glass rod (rubbed with silk cloth) and touched the metal top of another positively charged electroscope with it. This made the diverged leaves of the electroscope to diverge (or open up) even more. Askshy did not understand the various conclusions which could be drawn from all these observations. Saurabh explained him everthing very clearly. (a) What conclusion can be drawn from the observation that a plastic comb rubbed in dry hair and a glass rod rubbed with silk cloth, both attract tiny pieces of paper ? (b) What do the above observations tell us about the atoms present on plastic comb and glass rod ? (c) (i) What conclusion do you get from the observation that when a plastic comb rubbed in dry hair is touched with the metal top of a positively charged electroscope, then its diverged leaves fold up ? (ii) What conclusion do you get form the observation that when a glass rod rubbed with silk cloth is touched with the metal top of a positvely charged electrosope, then its leaves diverage even more ? (d) What are the two types of electric charges present in atoms as shown by the above observations ? Name the subatomic particles which carry these charges. (e) (i) Which electric charges are agained by a plastic comb on rubbing in dry hair ? (ii) Which electric charge are lost by a glass rod on rubbing with silk cloth ? (f) What values are displayed by Saurabh in this episode ?

Knowledge Check

  • A plastic comb is rubbed with dry hair whereas a glass rod is rubbed with a piece of silk cloth. Which of these will get negatively charged ? A.Plastic comb B.Glass rod C.Dry hair D.Silk cloth

    A
    A and B
    B
    B and C
    C
    A and D
    D
    B and D

  • When a glass rod is rubbed with silk, it

    A
    gains electrons from silk
    B
    gives electrons to silk
    C
    gains protons from silk
    D
    given protons to silk

  • When the glass rod is rubbed with the piece of silk, then according to known tradition :

    A
    Both get negatively charged
    B
    Both get positively charged
    C
    Glass rod got negatively charged and silk piece got positively charged
    D
    Glass rod got positively charged and silk piece got negatively charged

    • Similar Questions

    Explore conceptually related problems

    When a glass rod is rubbled with a silk cloth, charges appear on both. A similar phenomenon is observed with many other pairs of bodies. Explain how this observation is consistent with the law of conservation of charge.

    When a glass rod is rubbed with a slik cloth , charges appear on both. A similar phenomenon is observed with many other pairs of of bodies. Explain how this observation is consistent with the law of conservation of charges.

    Complete the following statement : When a glass rod is rubbed with silk cloth, the rod become positively charged as

    When a glass rod is rubbed with silk, then

    When a glass rod is rubbed with a silk cloth, charge appears on both. This observation is consistent with law of conservation of charge as

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