Advertisements
Advertisements
प्रश्न
A ______ can be detected with an electroscope.
पर्याय
always repulsion
always attraction
displacement of negative charge
displacement of positive charge
atom
molecule
steel
copper
plastic
inflated balloon
charged object
gold
Advertisements
उत्तर
A charged object can be detected with an electroscope.
Explanation:
This instrument is used to detect electrical charge (positive or negative). When an object is electrically charged, its reaction in the electroscope indicates whether the object is charged or not. The electroscope has a filament or blades, which can move closer or farther from each other when charged, thus indicating the charge.
संबंधित प्रश्न
______ does not get electrically charged easily by rubbing.
Rubbing of comb with hair
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 |
What are electric lines of force?
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?
A comb rubbed with hair and brought near pieces of paper attracts them, because both comb and paper get similarly charged.
Calculate the charge passing through a lamp in 2 minutes if the current is 3A.
Define electric field.
