Electrostatics Test

Result

Electrostatics Test - 59

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Question 1
4 / -1

An air capacitor is charged with an amount of charge q and dipped into an oil tank. If the oil is pumped out, the electric field between the plates of capacitor will

A
Increase

B
Decrease

C
Remain the same

D
Become zero

Solution
Question 2
4 / -1

The outer sphere of a spherical air capacitor is earthed. For increasing its capacitance

A
Vaccum is created between two spheres

B
Dielectric material is filled between the two spheres

C
The space between two spheres is increased

D
The earthing of the outer sphere is removed
Question 3
4 / -1

The plates of parallel plate capacitor are charged upto 100V. A₂ mm thick plate is inserted between the plates. Then to maintain the same potential difference, the distance between the plates is increased by 1.6mm. The dielectric constant of the plate is

A
5

B
4

C
1.25

D
2.5

Solution
Question 4
4 / -1

Force acting upon a charged particle kept between the plates of a charged condenser is F. If one plate of the condenser is removed, then the force acting on the same particle will become

A
0

B
F/2

C
F

D
2F

Solution
Question 5
4 / -1

Two metallic charged spheres whose radii are 20 cm and 10 cm respectively, have each 150 micro-coulomb positive charge. The common potential after they are connected by a conducting wire is

A
9 × 10⁶ volts

B
4.5 × 10⁶ volts

C
1.8 × 10⁷ volts

D
13.5 × 10⁶ volts

Solution
Question 6
4 / -1

A parallel plate air capacitor has a capacitance C. When it is half filled with a dielectric of dielectric constant 5,the percentage increase in the capacitance will be

A
400%

B
66.6%

C
33.3%

D
200%

Solution
Question 7
4 / -1

A frictionless dielectric plate S is kept on a frictionless table T. A charged parallel plate capacitance C (of which the plates are frictionless) is kept near it. The plate S is in between the plates. When the plate S is left between the plates

A
It will remain stationary on the table

B
It is pulled by the capacitor and will pass on the other end

C
It is pulled between the plates and will remain there

D
All of the above statements are false
Question 8
4 / -1

A capacitor with air as the dielectric is charged to a potential of 100 volts. If the space between the plate is now filled with a dielectric of dielectric constant 10, the potential difference between the plates will be

A
1000 volts

B
100 volts

C
10 volts

D
Zero

Solution
Question 9
4 / -1

The distance between the circular plates of a parallel plate condenser 40mm in diameter, in order to have same capacity as a sphere of radius 1 metre is

A
0.01 mm

B
0.1 mm

C
1.0 mm

D
10 mm

Solution
Question 10
4 / -1

When a slab of dielectric material is introduced between the parallel plates of a capacitor which remains connected to a battery, then charge on plates relative to earlier charge

A
Is less

B
Is same

C
Is more

D
May be less or more depending on the nature of the material introduced