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Question
A ______ can be detected with an electroscope.
Options
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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Solution
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.
RELATED QUESTIONS
______ is responsible for generation of electric charge in an object.
______ does not get electrically charged easily by rubbing.
There is ______ when opposite electric charge come near each other.
Electric field lines ______ from positive charge and ______ in negative charge.
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.
If an electron is added in excess to an atom then the atom is ______ charged.
The excess of electrons makes an object negative and ______ of electrons makes it positive.
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?
