Electrostatics Test

Result

Electrostatics Test - 101

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Weekly Quiz Competition

Question 1
4 / -1

The dimension of (1/2) ɛ₀E²(ɛ₀ : permittivity of free space; E: electric field) is

A
MLT^–1

B
ML²T^–2

C
ML^–1T^–2

D
ML²T^–1

Solution
Question 2
4 / -1

In the rectangle, shown below, the two corners have charges q₁ = –5 µC and q₂ = +2.0 µC. The work done in moving a charge +3.0 µC from B to A is (take1/4πɛ₀ =10¹⁰ N–m²/ C²)

A
2.8J

B
3.5 J

C
4.5 J

D
5.5 J

Solution
Question 3
4 / -1

If q is the charge per unit area on the surface of a conductor, then the electric field intensity at a point on the surface is

A

B

C

D
Question 4
4 / -1

A hollow conducting sphere of radius R has a charge (+Q) on its surface. What is the electric potential within the sphere at a distance r = R/3 from its centre?

A
Zero

B

C

D
Question 5
4 / -1

Two spheres A and B of radius \'a\' and `b\' at same electric potential. The ratio charge densities of A and B is

A

B

C

D

Solution
Question 6
4 / -1

Electric field intensity at a point in between two parallel sheets with like charges of same surface charge densities (σ) is

A

B

C
Zero

D

Solution
Question 7
4 / -1

In an hydrogen atom, the electron revolves around the nucleus in an orbit of radius 0.53 × 10^–10 m. Then theelectrical potential produced by the nucleus at theposition of the electron is

A
–13.6 V

B
–27.2 V

C
27.2 V

D
13.6 V

Solution
Question 8
4 / -1

Three identical charges each of 2µC are placed at the vertices of a triangle ABC as shown in the figure
If AB + AC = 12 cm and AB. AC = 32 cm², the potential energy of the charge at A is

A
1.53 J

B
5.31 J

C
3.15 J

D
1.35 J

Solution
Question 9
4 / -1

The acceleration of an electron in an electric field of magnitude 50 V/cm, if e/m value of electron is 1.76 × 10¹¹ C/kg, is

A
8.8 × 10¹⁴ m/sec²

B
6.2 × 10¹³ m/sec²

C
5.4 × 10¹² m/sec²

D
Zero

Solution
Question 10
4 / -1

A

B

C

D
7

Solution