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प्रश्न
How will you use a gold leaf electroscope to find out whether the charge on a charged body is positive or negative?
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उत्तर
(a) Charge negatively the gold-leaf electroscope by conduction i.e. To detect the kind of charge by a positively charged gold leaf electroscope touching the disc of GL.E. with negatively charged ebonite rod. The leaves diverge (because of repulsion) Note the divergence as shown in figure (a).
(b) Bringa charged body to be tested in contact with the disc. If divergence in leaves increases, it has a similar charge i.e. negative as shown in figure (b)
(c) If divergence decrease, the body has opposite charge i.e. positive charge as shown in figure (c).
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संबंधित प्रश्न
All metals are insulators of electricity.
An ebonite rod can be charged by touching it with a charged copper rod.
When a glass rod is rubbed with silk, the glass rod and the silk get charged because
An ebonite rod is rubbed with fur. Compare the charges acquired by them.
In each of the following cases, State which body loses electrons:
(a) A glass rod when rubbed with silk.
(b) An ebonite rod when rubbed with fur.
Explain the charging by conduction in terms of movement of electrons.
Figure below shows a metal rod AB placed on an insulating stand.
In figure (a) a negatively charged ebonite rod C is touched with the metal rod AB, while in figure (b), the negatively charged ebonite rod C is held near the rod AB. State the kind of charges at the ends A and B of the rod, in each case.
Can you charge an insulator by the method of conduction?
How will you use a pith ball electroscope to find out whether the charge on a charged body is positive or negative?
State three safety measures that you will observe in thunder storm.
