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प्रश्न
A lightning conductor is made of a ______ strip.
विकल्प
always repulsion
always attraction
displacement of negative charge
displacement of positive charge
atom
molecule
steel
copper
plastic
inflated balloon
charged object
gold
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उत्तर
A lightning conductor is made of a copper strip.
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 |
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.
What are positive and negative ions?
What is the ground connection?
As electrons are revolving in the ______ of an atom they can be easily removed from an atom and also added to it.
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?
Calculate the charge passing through a lamp in 2 minutes if the current is 3A.
Define electric field.
