NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 343 - 346 of 2320

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Question number: 343

» Electrostatics » Electrostatic Potential Energy

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MCQ▾

Question

Two equal charges q are placed at a distance of 2a and a third charge -2q is placed at the midpoint. The potential energy of the system is

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 344

» Properties of Solids & Liquids » Viscosity

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MCQ▾

Question

A jar is filled with two non-mixing liquids 1 and 2 having densities ρ 1 and, ρ 2 respectively. A solid ball, made of a material of density ρ 3, is dropped in the jar. It comes to equilibrium in the position shown in the figure. Which of the following is true for ρ 1, ρ 2 and ρ 3 ?

Equilibrium condition in jar

Equilibrium Condition in Jar

Choices

Choice (4)Response

a.

ρ 1 > ρ 3 > ρ 2

b.

ρ 3 < ρ 1 < ρ 2

c.

ρ 1 < ρ 2 < ρ 3

d.

ρ 1 < ρ 3 < ρ 2

Question number: 345

» Electrostatics » Electric Potential

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MCQ▾

Question

Ten electrons are equally spaced and fixed around a circle of radius R. Relative to V = 0 at infinity, the electrostatic potential V and the electric field E at the center C are

Choices

Choice (4)Response

a.

V = 0 and

b.

V = 0 and

c.

V ≠ 0 and

d.

V ≠ 0 and

Question number: 346

» Rotational Motion » Torque

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Assertion-Reason▾

Question

Assertion (Ꭺ)

Torque due to force is maximum when angle between r and F is 90°.

Reason (Ꭱ)

The unit of torque is newton- meter.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Ꭺ is false but Ꭱ is true

c.

Both Ꭺ and Ꭱ are false

d.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

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