Advertisements
Advertisements
प्रश्न
Exercise.
Rubbing a comb on hair makes the comb get – 0.4C.
- Find which material has lost electron and which one gained it.
- Find how many electrons are transferred in this process.
Advertisements
उत्तर
-
The material is comb which gained electrons and the hair gained it.
-
Charge on 1 electron, e = 1.6 × 10– 19C
q = ne or n = `q/e`
n = `0.4/1.6` × 10– 19 = 0.25 × 1019 = 2.5 × 1018
APPEARS IN
संबंधित प्रश्न
______ is responsible for generation of electric charge in an object.
Match the following.
| 1. | Electric charge | a. | ohm |
| 2. | Potential difference | b. | ampere |
| 3. | Electric field | c. | coulomb |
| 4. | Resistance | d. | newton per coulomb |
| 5. | Electric current | e. | volt |
State whether true or false. If false, correct the statement.
Electrically neutral means it is either zero or equal positive and negative charges.
Electrons move from ______ potential to ______ potential.
As electrons are revolving in the ______ of an atom they can be easily removed from an atom and also added to it.
If an electron is added in excess to an atom then the atom is ______ charged.
Electric charge is ______ in nature.
A comb rubbed with hair and brought near pieces of paper attracts them, because both comb and paper get similarly charged.
How many electrons accumulate to make 1C of electric charge?
Define electric field.
