NEET (National Eligibility cum Medical Entrance Test) Physics: Questions 391 - 395 of 2142

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Question number: 391

» Electrostatics » Coulomb's Law

MCQ▾

Question

Electric charges of 1μC, -1μC and 2μC are placed in air at the corners A, B and C respectively of an equilateral triangle ABC having length of each side 10 cm. The resultant force on the charge at C is

Choices

Choice (4) Response

a.

3.6 N

b.

2.7 N

c.

1.8 N

d.

0.9 N

Question number: 392

» Rotational Motion » Angular Momentum

MCQ▾

Question

Calculate the angular momentum of a body whose rotational energy is 5 joule. If the angular momentum vector coincides with the axis of rotation and its moment of inertia about this axis is 3 x 10 -8 kg m 2

Choices

Choice (4) Response

a.

4 x 10 -3 kg m 2 /s

b.

5.47 x 10 -2 kg m 2 /s

c.

2 x 10 -3 kg m 2 /s

d.

Question does not provide sufficient data or is vague

Question number: 393

» Electrostatics » Electrostatic Potential Energy

MCQ▾

Question

Four charges + q, -q, + q and -q are put together on four corners of a square as shown in figure. The net electrostatic energy of the system is,

Square with Four charges + q, -q, + q and -q

Square With Four Charges + Q, -Q, + Q and -Q

Four charges + q, -q, + q and -q are put together on four corners of a square

Choices

Choice (4) Response

a.

Zero

b.

Equation

c.

Equation

d.

All of the above

Question number: 394

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A body of mass 20 kg moving with a velocity of 3 m/s, rebounds on a wall with same velocity. The impulse on the body is -

Choices

Choice (4) Response

a.

60 Ns

b.

120 Ns

c.

30 Ns

d.

180 Ns

Question number: 395

» Laws of Motion » Force and Inertia

MCQ▾

Question

A body of mass 15 kg moving with a velocity of 10 m/s is to be stopped by a resistive force in 15 sec, the force will be

Choices

Choice (4) Response

a.

5 N

b.

10 N

c.

50 N

d.

100 N

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