Electrostatics Test

Result

Electrostatics Test - 112

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Weekly Quiz Competition

Question 1
4 / -1

Gauss\'s law is valid for

A
Any closed surface

B
Only regular close surfaces

C
Any open surface

D
Only irregular open surfaces
Question 2
4 / -1

Gauss law of gravitation is

A

B

C

D
All of these
Question 3
4 / -1

Charge motion within the Gaussian surface gives changing physical quantity

A
Electric field

B
Electric flux

C
Charge

D
Gaussian surface area
Question 4
4 / -1

The angle subtended by a circular disk of diameter 2 cm at a distance 1000 cm form your eye is

A
0.2°

B
0.002°

C
0.11°

D
0.22°

Solution
Question 5
4 / -1

Gauss\'s law of electrostatic would be invalid if

A
There were magnetic monopoles

B
The speed of light was not a universal constant

C
The inverse square law was not exactly true

D
The electrical charge was not quantized
Question 6
4 / -1

A charge Q is enclosed by a Gaussian spherical surface of radius R. If the radius is doubled, then the outward electric flux will

A
Be doubled

B
Increase four times

C
Be reduced to half

D
Remain the same

Solution
Question 7
4 / -1

What is the flux through a cube of side \'a\' if a point charge of q is at one of its corner?

A

B

C

D

Solution
Question 8
4 / -1

A capacitor is charged by using a battery which is then disconnected. A dielectric slab is then slipped between the plates, which result in

A
Reduction of charge on the plates and increase of potential difference across the plates

B
Increase in the potential difference across the plate, reduction in the stored energy, but no change in the charge on the plates

C
Decrease in the potential difference across the plates, reduction in the stored energy, but no change in the charge on the plates

D
None of the above

Solution
Question 9
4 / -1

The energy of a charged capacitor is given by the expression (q = charge on the conductor and C = its capacity)

A

B

C

D

Solution
Question 10
4 / -1

The earth has Volume \'V\' and Surface Area \'A\' then capacitance would be

A

B

C

D

Solution