NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 277 - 281 of 2142

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Question number: 277

» Electrostatics » Electric Potential

MCQ▾

Question

A charge (-q) and another charge (+Q) are kept at two points A and B respectively. Keeping the charge (+Q) fixed at B, the charge (-q) at A is moved to another point C such that ABC forms an equilateral triangle of side l. The net work done by electrostatic field in moving the charge (-q)

Choices

Choice (4) Response

a.

b.

Zero

c.

d.

Question number: 278

» Kinematics » Uniform and Non-Uniform Motion

MCQ▾

Question

A body whose mass 4 kg is acted upon by two forces (8i + 10j) N and (4i + 8j) N. The acceleration produced will be (in m/s 2) -

Choices

Choice (4) Response

a.

2i + 3j

b.

6i + 9j

c.

1/3 (G + 3)

d.

(3i + 2j)

Question number: 279

» Electrostatics » Gauss's Law

MCQ▾

Question

A sphere of radius R has a uniform distribution of electric charge in its volume. At a distance x from its center, for x < R, the electric field is directly proportional to

Choices

Choice (4) Response

a.

x

b.

x 2

c.

d.

Question number: 280

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A mass of 10 kg is hung to a spring balance in lift. If the lift is moving with an acceleration g/3 in upward & downward directions, choose the correct options related to the reading of the spring balance.

  1. 13.3 kg
  2. 66.7 kg
  3. 32.6 kg
  4. 0

Select the correct answers and mark it according to the following

Choices

Choice (4) Response

a.

1 and 2 are correct

b.

1 and 3 are correct

c.

1,2 and 3 are correct

d.

2 and 4 are correct

Question number: 281

» Electrostatics » Electrostatic Potential Energy

MCQ▾

Question

When the separation between two charges is increased, the electric potential energy of the charges is,

Choices

Choice (4) Response

a.

decreases

b.

may increase or decrease

c.

Remains the same

d.

Increases

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