Electrostatics (NEET Physics): Questions 45 - 49 of 107

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Question number: 45

» Electrostatics » Capacitors

MCQ▾

Question

Separation between the plates of a parallel plate capacitor is d and the area of each plate is A. When a slab of material of dielectric constant k and thickness t (t < d) is introduced between the plates, its capacitance becomes

Choices

Choice (4) Response
a.

ϵ0Adt(1+1k)

b.

ϵ0Ad+t(11k)

c.

ϵ0Ad+t(1+1k)

d.

ϵ0Adt(11k)

Question number: 46

» Electrostatics » Coulomb's Law

MCQ▾

Question

Equal charges q are placed at the four corners A, B, C, D of a square of length a. The magnitude of the force on the charge at B will be

Choices

Choice (4) Response
a.

q2πϵ0a2

b.

3q24πϵ0a2

c.

(1+222)q24πϵ0a2

d.

(2+12)q24πϵ0a2

Passage

An electric dipole (AB) consisting of two particles of equal and opposite charge and same mass is released in an electric field. In the figure field lines are without considering effect of field of dipole.

Dipole in electric field

Dipole in Electric Field

An electric dipole (AB) consisting of two particles of equal and opposite charge and same mass is released in an electric field

Question number: 47 (1 of 2 Based on Passage) Show Passage

» Electrostatics » Electric Dipole

MCQ▾

Question

The center of mass of the dipole

Choices

Choice (4) Response
a.

Has acceleration with positive x and y components

b.

Has no acceleration

c.

Has acceleration with negative x component and positive y component

d.

Has acceleration with positive x component and negative y component

Question number: 48 (2 of 2 Based on Passage) Show Passage

» Electrostatics » Electric Dipole

MCQ▾

Question

Angular acceleration of the dipole, immediately after it is released

Choices

Choice (4) Response
a.

is anticlockwise

b.

is clockwise

c.

Cannot be determined from the given information.

d.

is zero

Question number: 49

» Electrostatics » Electric Potential

Assertion-Reason▾

Assertion (Ꭺ)

Electric potential of earth is taken to be zero as a reference.

Reason (Ꭱ)

The electric field produced by earth in surrounding space is zero.

Choices

Choice (4) Response
a. Both Ꭺ and Ꭱ are false
b. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ
c. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
d. Ꭺ is false but Ꭱ is true

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