How can the neutral body be charged electrically ?
How can the neutral body be charged electrically ?
To electrify a neutral body, we need to add or remove one kind of charge.
A body can thus be charged positively by losing some of its electrons. Similarly, a body can be charged negatively by gaining electrons.
The body which removes the electrons its mass decreases slightly and the body which gains the electrons its mass increases.
When we rub a glass rod with silk, some of the electrons from the rod are transferred to the silk cloth. Thus, the rod gets positively charged and the silk gets negatively charged.
No new charge is created in the process of rubbing.
Similar Questions
When a glass rod is rubbed 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 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.
A polythene piece rubbed with wool is found to have a negative charge of $3 \times 10^{-7} \;C$
$(a)$ Estimate the number of electrons transferred (from which to which?)
$(b)$ Is there a transfer of mass from wool to polythene?
A polythene piece rubbed with wool is found to have a negative charge of $3 \times 10^{-7} \;C$
$(a)$ Estimate the number of electrons transferred (from which to which?)
$(b)$ Is there a transfer of mass from wool to polythene?
Is the induced charge on the surface of metal or inside it ?
Is the induced charge on the surface of metal or inside it ?
By which instrument, the charge on object can be detected ?
By which instrument, the charge on object can be detected ?
How does electroscope work ?
How does electroscope work ?