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प्रश्न
A ______ can be detected with an electroscope.
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 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
A lightning conductor is made of a ______ strip.
______ does not get electrically charged easily by rubbing.
There is ______ when opposite electric charge come near each other.
Rubbing of comb with hair
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 |
State whether true or false. If false, correct the statement.
Electrically neutral means it is either zero or equal positive and negative charges.
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.
