NEET Physics: Questions 407 - 410 of 2098

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Question number: 407

» Laws of Motion » Momentum

MCQ▾

Question

A boat of mass 1000 kg is moving with a velocity of 8 m/s. A person of mass 70 kg jumps into the boat. The velocity of the boat with the person will be –

Choices

Choice (4) Response

a.

74.8 m/s

b.

7.48 m/s

c.

77.1 cm/s

d.

7.71 cm/s

Question number: 408

» Electrostatics » Electric Field Due to a Point Charge

Assertion-Reason▾

Assertion (Ꭺ)

A point charge is brought in an electric field. The field at a nearby point will increase, whatever be the nature of the charge.

Reason (Ꭱ)

The electric field is dependent on the nature of charge.

Choices

Choice (4) Response

a.

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

b.

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

c.

Ꭺ is true but Ꭱ is false

d.

Ꭺ is false but Ꭱ is true

Question number: 409

» Laws of Motion » Force and Inertia

MCQ▾

Question

A string of length L is fixed at one end and carries a mass M at the other end. The string makes 2/tc revolutions per second around the vertical axis through the fixed end as Shown in the figure, then tension in the string is

String motion of length L carrying mass M

String Motion of Length L Carrying Mass M

A string of length L is fixed at one end and carries a mass M at the other end

Choices

Choice (4) Response

a.

4 ML

b.

5ML

c.

2 ML

d.

16 ML

Question number: 410

» Rotational Motion » Torque

MCQ▾

Question

A horizontal force F is applied such that the block remains stationary, then which of the following statement is false

Stationary block with horizontal force F

Stationary Block With Horizontal Force F

In above figure we shows that force F is applied as the block is stationary.

Choices

Choice (4) Response

a.

F = N [where N is the normal reaction]

b.

F will not produce torque

c.

N will not produce torque

d.

f = mg [where f is the friction force]

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