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Free download in PDF Electrostatics Short Questions & Answers for competitive exams. These short objective type questions with answers are very important for competitive exams like IIT, JEE, NEET, AIIMS, JIPMER etc.
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
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
43
1 micro farad (1µF) is equal to
[A]
1×10-9F
[B]
1×10-12F
[C]
1×10-6F
[D]
1×10-10F
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
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
46
A device which stores charge is called
[A]
Resistor
[B]
Inductor
[C]
capacitor
[D]
transistor
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
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
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