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Electrostatics
9 Class 10 Physics questions with answers and explanations.
Printable worksheet with answer key
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Like charges:
- 1 Attract each other
- 2 Cancel
- 3 Repel each other
- 4 Have no effect
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Correct answer: Repel each other
Like charges repel and unlike charges attract.
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The SI unit of charge is the:
- 1 Ampere
- 2 Volt
- 3 Farad
- 4 Coulomb
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When a glass rod is rubbed with silk, the glass rod becomes:
- 1 Positively charged
- 2 Negatively charged
- 3 Neutral
- 4 Magnetised
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Correct answer: Positively charged
Glass loses electrons to silk and becomes positively charged.
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The capacitance C of a capacitor is given by:
- 1 C = V / Q
- 2 C = Q + V
- 3 C = Q V
- 4 C = Q / V
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Correct answer: C = Q / V
Capacitance is the charge stored per unit potential difference.
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A 5 microfarad capacitor is charged to 10 V. What charge does it store?
- 1 15 microcoulombs
- 2 50 microcoulombs
- 3 2 microcoulombs
- 4 0.5 microcoulombs
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Charging by rubbing is called charging by:
- 1 Radiation
- 2 Conduction
- 3 Induction
- 4 Friction
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A device that detects charge is an:
- 1 Ammeter
- 2 Electroscope
- 3 Barometer
- 4 Voltmeter
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The unit of potential difference is the:
- 1 Ampere
- 2 Ohm
- 3 Coulomb
- 4 Volt
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A good conductor of electricity is:
- 1 Glass
- 2 Rubber
- 3 Copper
- 4 Wood