Electrostatics Test

Result

Electrostatics Test - 49

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

Two insulating plates are both uniformly charged in such a way that the potential difference between them is V₂ – V₁ =20V. (i. e., plate 2 is at a higher potential). The plates are separated by d = 0.1 m and can be treated as infinitely large. An electron is released from rest on the inner surface of plate 1. What is its speed when it hits plate 2 (e = 1.6 × 10^–19 C, m_e, = 9.11 × 10^–31 kg)

A
7.02 × 10¹² m/s

B
1.87 × 10⁶ m/s

C
32 × 10^–19 m/s

D
2.65 × 10⁶ m/s

Solution
Question 2
4 / -1

Two spherical conductors A and B of radii 1 mm and 2 mm are separated by a distance 5 cm and are uniformly charged. If the spheres are connected by a conducting wire then in equilibrium condition, the ratio of the magnitude of the electric fields at the surfaces of spheres A and B is

A
1 : 2

B
2 : 1

C
1 : 4

D
4 : 1

Solution
Question 3
4 / -1

Let V be the electric potential at a given point. Then the electric field E_x along x-direction at that point is given by

A

B

C

D

Solution
Question 4
4 / -1

A hollow conducting spherical shell of radius R is charged with Q coulomb. The amount of work done for moving any charge q from the centre to the surface of the shell will be

A

B
Zero

C

D

Solution
Question 5
4 / -1

Figure shows a triangular array of three point charges. The electric potential V of these source charges at the midpoint P of the base of the triangle is

A
55 kV

B
45 kV

C
63 kV

D
49 kV

Solution
Question 6
4 / -1

Charge Q is placed on each of (n – 1) corners of a polygon of n sides. The distance of centre of the polygon from each corner is ‘r’, then electric field at centre is

A

B

C

D
Zero

Solution
Question 7
4 / -1

A
Zero

B

C

D

Solution
Question 8
4 / -1

Charges +2 q, + q and +q are placed at the corners A, B and C of an equilateral triangle ABC. If E is the electric field at the circumcentre O of the triangle, due to the charge +q, then the magnitude and direction of the resultant electric field at O is

A
E along AO

B
2E along AO

C
E along BO

D
E along CO

Solution
Question 9
4 / -1

N identical drops of mercury are charge simultaneously to 10 volt. When combined to form one large drop, the potential is found to be 40 volt, the value of N is

A
4

B
6

C
8

D
10

Solution
Question 10
4 / -1

The electrostatic potential energy between proton and electron separated by a distance 1 Å is

A
13.6 eV

B
27.2 eV

C
–14.4 eV

D
1.44 eV

Solution