Electrostatics Test

Result

Electrostatics Test - 158

Score
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Weekly Quiz Competition

Question 1
4 / -1

Two equal charges q are placed at a distance of 2a and a third charge –2q is placed at the midpoint. The potential energy of the system is ....

A

B

C

D

Solution
Question 2
4 / -1

A
9 J

B

C

D

Solution
Question 3
4 / -1

A

B

C

D

Solution
Question 4
4 / -1

A sphere of radius 1cm has potential of 8000 v, then energy density near its surface will be ...

A

B

C

D

Solution
Question 5
4 / -1

If a charged spherical conductor of radius 10cm has potential v at a point distant 5 cm from its centre, then the potential at a point distant 15cm from the centre will be .....

A

B

C
3V

D

Solution
Question 6
4 / -1

Electric charges of +10c, 5c, –3c and 8c are placed at the corners of a square of side √2 m the potential at the centre of the square is ......

A
1.8 V

B

C

D

Solution
Question 7
4 / -1

Two positive point charges of 12c and 8c are 10 cm apart each other. The work done in bringing them 4cm closer is .....

A
5.8 J

B
13 eV

C
5.8 eV

D
13 J

Solution
Question 8
4 / -1

A

B

C

D

Solution
Question 9
4 / -1

If an electron moves from rest from a point at which potential is 50 volt to another point at which potential is 70 volt, then its kinetic energy in the final state will be .....

A
1 N

B

C

D
1 dyne

Solution
Question 10
4 / -1

Three charges Q, + q and + q are placed at the vertices of a right-angled triangle as shown. The net electrostatic energy of the configuration is zero if Q is equal to .....

A

B

C

D

Solution