Electrostatics Test

Result

Electrostatics Test - 107

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Weekly Quiz Competition

Question 1
4 / -1

The electric potential V at any point (x, y, z), all in meters in space is given by V = 4x². VoltThe electric field at the point (1, 0, 2) in volt/meter is

A
16 along positive X-axis

B
8 along negative X-axis

C
8 along negative X-axis

D
16 along negative X-axis

Solution
Question 2
4 / -1

Three charges, each +q, are placed at the corners of an isosceles triangle ABC of sides BC and AC, 2a. D and E are the mid points of BC and CA. The work done in takinga charge Q from D to E is

A
Zero

B

C

D

Solution
Question 3
4 / -1

The electric field created by a point charge falls with distance r from the point charge as

A

B

C

D

Solution
Question 4
4 / -1

An electric dipole when placed in a uniform electric field E will have minimum potential energy, if the positive direction of dipole moments makes the following angle with E

A
π

B
π /2

C
Zero

D
3π /2

Solution
Question 5
4 / -1

The electric potential at a point on the axis of an electric dipole depends on the distance r of the point form the dipole as

A

B

C

D

Solution
Question 6
4 / -1

An electric dipole is kept in non-uniform electric field. It experiences

A
A force and a torque

B
A force but not a torque

C
A torque but not a force

D
Neither a force nor a torque

Solution
Question 7
4 / -1

An electric dipole consisting of two opposite charges of 2 × 10^–6 C each separated by a distance of 3 cm isplaced in an electric field of 2 × 10⁵ N/C. The maximum torque on the dipole will be

A
12 × 10¹ Nm

B
12 ×10^–3 Nm

C
24 × 10^–1 Nm

D
24 ×10^–3 Nm

Solution
Question 8
4 / -1

A
pE

B
+2pE

C
–2pE

D
Zero

Solution
Question 9
4 / -1

A
α

B
θ

C
θ + α

D
θ + 2α
Question 10
4 / -1

An electron dipole is placed along the x–axis at the origin O. a point P is at a distance of 20 cm from this origin such that OP makes an angle θ with the x–axis, the value of θ would be

A

B

C

D

Solution