Electrostatics Questions | Electrostatics Short Questions & Answers

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Questions
41 Ability of capacitor to store charge depends upon
A area of plates
B distance between plates
C type of dielectric used
D all of above

Answer: all of above
42 Coulomb's force between 2 point charges 10µC and 5µC placed at a distance of 150cm is
A 0.2 N
B 0.5 N
C 2 N
D 10 N

Answer: 0.2 N
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43 1 micro farad (1µF) is equal to
A 1×10-9F
B 1×10-12F
C 1×10-6F
D 1×10-10F

Answer: 1×10-6F
44 If a charged rod is brought closer to a gas filled balloon then
A Radius decreases
B Balloon bursts
C Radius increase
D Balloon squeezes

Answer: Radius increase
45 3 capacitors with capacitances 5µF, 6µF and 7µF are arranged in parallel combination with a battery of 5V, as 1µF = 10-6F, voltage across each capacitor is
A 15V
B 5V
C 18V
D 20V

Answer: 5V
46 A device which stores charge is called
A Resistor
B Inductor
C capacitor
D transistor

Answer: capacitor
47 In electrostatic air cleaner, air mixed with dust and pollen enters device across
A positively charged mesh
B negatively charged mesh
C neutral mesh
D dual charged mesh

Answer: positively charged mesh
48 If 5 J of work is required to shift 10 C charge from one place to another then potential difference is
A 0.5 V
B 2 V
C 5 V
D 10 V

Answer: 0.5 V
49 As per Coulomb's law, force of attraction or repulsion between two point charges is directly proportional to
A sum of the magnitude of charges
B square of the distance between them
C product of the magnitude of charges
D cube of the distance

Answer: product of the magnitude of charges
50 Resonant circuits that tune radios to particular frequencies are called
A plate circuits
B radio circuits
C filter circuits
D fiber circuits

Answer: filter circuits

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