NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 307 - 312 of 2142

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Question number: 307

» Laws of Motion » Force and Inertia

MCQ▾

Question

The string of a pendulum is horizontal. The mass of the bob is m. Now the string is released. The tension in the string in the lowest position is –

Choices

Choice (4) Response

a.

1 mg

b.

2 mg

c.

3 mg

d.

4 mg

Passage

Read the passage given below and answer the questions that follows:

Three of the fundamental constants of physics are the universal gravitational constant, G = 6.7 x 10 Wkg-V2, the speed of light, c - 3.0 x 108 m/s, and Planck’s constant, ft = 6.6x 10 - 34 Js-1. Two particles A and B are projected in the vertical plane with same initial velocity u0 from part (0, 0) and (, -h) towards each other as shown in figure at t = 0.

Graph of projection of A and B particles

Graph of Projection of a and B Particles

Projection of two particle A & B in vertical plane

Question number: 308 (1 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

The path of particle A with respect to particle B will be -

Choices

Choice (4) Response

a.

Straight line parallel to y-axis

b.

Straight line parallel to x-axis

c.

parabola

d.

None of the above

Question number: 309 (2 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

Minimum distance between particle A and B during motion will be-

Choices

Choice (4) Response

a.

b.

c.

d.

h

Question number: 310 (3 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

The time when separation between A and B is minimum is

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 311

» Properties of Solids & Liquids » Terminal Velocity

MCQ▾

Question

If the terminal speed of a sphere of gold (density = 19.5 kg/m 3) is 0.2 m/s in a viscous liquid (density = 1.5 kg/m 3), find the terminal speed of a sphere of silver (density = 10.5 kg/m 3) of the same size in the same liquid

Choices

Choice (4) Response

a.

0.4 m/s

b.

0.1 m/s

c.

0.133 m/s

d.

0.2 m/s

Question number: 312

» 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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