NEET Physics: Questions 297 - 300 of 2098

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Question number: 297

» Electrostatics » Electrostatic Potential Energy

MCQ▾

Question

Three charges of equal value q’ are placed at the vertices of an equilateral triangle. What is the net potential energy, if the side of equilateral triangle is l?

Choices

Choice (4) Response

a.

14πϵ03q2l

b.

-14πϵ0q2l

c.

14πϵ02q2l

d.

14πϵ04q2l

Question number: 298

» Electrostatics » Coulomb's Law

MCQ▾

Question

A total charge Q is broken in two parts Q 1 and Q 2 and they are placed at a distance R from each other. The maximum force of repulsion between them will occur, when

Choices

Choice (4) Response

a.

Q1=QR,Q2=QR

b.

Q2=Q4,Q1=Q2Q3

c.

Q2=QR,Q1=QQR

d.

Q2=Q4,Q1=Q3Q4

Question number: 299

» 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: 300

» 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

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