Electrostatics Test

Result

Electrostatics Test - 60

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Question 1
4 / -1

The capacitance of a parallel plate condenser does not depend on

A
Area of the plates

B
Medium between the plates

C
Distance between the plates

D
Metal of the plates
Question 2
4 / -1

Between the plates of a parallel plate condenser there is 1mm thick paper of dielectric constant 4. It is charged at 100 volt. The electric field in volt/metre between the plates of the capacitor is

A
100

B
100000

C
25000

D
4000000
Question 3
4 / -1

The electric field between the two spheres of a charged spherical condenser

A
Is zero

B
Is constant

C
Increases with distance from the centre

D
Decreases with distance from the centre

Solution
Question 4
4 / -1

The distance between the plates of a parallel plates capacitor is d. A metal plate of thickness d / 2 is placed between the plates. The capacitance would then be

A
Unchanged

B
Halved

C
Zero

D
Doubled

Solution
Question 5
4 / -1

An uncharged capacitor is connected to a battery. On charging the capacitor

A
All the energy supplied is stored in the capacitor

B
Half the energy supplied is stored in the capacitor

C
The energy stored depends upon the capacity of the capacitor only

D
The energy stored depends upon the time for which the capacitor is charged
Question 6
4 / -1

A capacitor is kept connected to the battery and a dielectric slab is inserted between the plates. During this process

A
No work is done

B
Work is done at the cost of the energy already stored in the capacitor before the slab is inserted

C
Work is done at the cost of the battery

D
Work is done at the cost of both the capacitor and the battery
Question 7
4 / -1

The capacitance of an air capacitor is 15µF the separation between the parallel plate is 6 mm. A copper plate of 3 mm thickness is introduced symmetrically between the plates. The capacitance now becomes

A
5µF

B
7.5µF

C
22.5 µF

D
30µF

Solution
Question 8
4 / -1

An air capacitor is connected to a battery. The effect of filling the space between the plates with a dielectric is to increase

A
The charge and the potential difference

B
The potential difference and the electric field

C
The electric field and the capacitance

D
The charge and the capacitance

Solution
Question 9
4 / -1

A light bulb, a capacitor and a battery are connected together as shown here, with switch S initially open, When the switch S is closed, which one of the following is true

A
The bulb will light up for an instant when the capacitor starts charging

B
The bulb will light up when the capacitor is fully charged

C
The bulb will not light up at all

D
The bulb will light up and go off at regular intervals
Question 10
4 / -1

The diameter of each plate of an air capacitor is 4 cm. To make the capacity of this plate capacitor equal to that of 20 cm diameter sphere, the distance between the plates will be

A
4 × 10^–3 m

B
1 × 10^–3 m

C
1 cm

D
1 × 10^–3 cm

Solution