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Electrostatics
Class 10 · Physics · 9 questions
Name: ____________________ Date: ____________
Like charges:
- A Attract each other
- B Cancel
- C Repel each other
- D Have no effect
The SI unit of charge is the:
- A Ampere
- B Volt
- C Farad
- D Coulomb
When a glass rod is rubbed with silk, the glass rod becomes:
- A Positively charged
- B Negatively charged
- C Neutral
- D Magnetised
The capacitance C of a capacitor is given by:
- A C = V / Q
- B C = Q + V
- C C = Q V
- D C = Q / V
A 5 microfarad capacitor is charged to 10 V. What charge does it store?
- A 15 microcoulombs
- B 50 microcoulombs
- C 2 microcoulombs
- D 0.5 microcoulombs
Charging by rubbing is called charging by:
- A Radiation
- B Conduction
- C Induction
- D Friction
A device that detects charge is an:
- A Ammeter
- B Electroscope
- C Barometer
- D Voltmeter
The unit of potential difference is the:
- A Ampere
- B Ohm
- C Coulomb
- D Volt
A good conductor of electricity is:
- A Glass
- B Rubber
- C Copper
- D Wood
Answer key
1. C, 2. D, 3. A, 4. D, 5. B, 6. D, 7. B, 8. D, 9. C
Like charges repel and unlike charges attract.
Charge is measured in coulombs.
Glass loses electrons to silk and becomes positively charged.
Capacitance is the charge stored per unit potential difference.
Q = C V = 5 x 10 = 50 microcoulombs.
Electrons are transferred by rubbing.
A gold leaf electroscope detects charge.
Potential difference is measured in volts.
Copper has many free electrons.