NEET Physics: Questions 439 - 442 of 2098

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Question number: 439

» Electrostatics » Electrostatic Potential Energy

MCQ▾

Question

In bringing an electron towards another electron, electrostatic potential energy of the system:

Choices

Choice (4) Response

a.

Increases

b.

Remains unchanged

c.

Decreases

d.

Becomes zero

Question number: 440

» Electrostatics » Capacitors

MCQ▾

Question

The false statement are, on increasing the distance between the plates of a parallel plate condenser,

(1) The electric field intensity between the plates will decrease

(2) The electric field intensity between the plates will increase

(3) The P. D. between the plates will decrease

(4) The electric field intensity between the plates will remain unchanged

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

1, 2 and 3 are correct

b.

2 and 4 are correct

c.

1 and 2 are correct

d.

1 and 3 are correct

Question number: 441

» Laws of Motion » Force and Inertia

MCQ▾

Question

A mass of 60 kg is on the floor of a lift moving down. The lift moves at first with an acceleration of 3 m/sec 2, then with constant velocity and finally with a retardation of 3m/sec2. Choose the correct options related to possible reactions exerted by the lift on the body in each part of the motion –

Select the correct answers and mark it according to the following

  1. 408 N
  2. 588 N
  3. 768 N
  4. 508 N

Choices

Choice (4) Response

a.

2 and 4 are correct

b.

1, 2 and 3 are correct

c.

1 and 3 are correct

d.

1 and 2 are correct

Question number: 442

» Laws of Motion » Force and Inertia

MCQ▾

Question

The roadway bridge over a canal is the form of an arc of a circle of radius 25 m. What is the minimum speed with which a car can cross the bridge without leaving contact with the ground at the highest point (g = 9.8 m/s 2)

Choices

Choice (4) Response

a.

49.49 m/s

b.

17.556 m/s

c.

39.899 m/s

d.

45.76 m/s

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