NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 409 - 412 of 2184

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Question number: 409

» Electrostatics » Electric Field Due to a Point Charge

Edit
Assertion-Reason▾

Question

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 false

b.

Ꭺ is false but Ꭱ is true

c.

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

d.

Ꭺ is true but Ꭱ is false

Question number: 410

» Laws of Motion » Force and Inertia

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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.

16 ML

b.

5ML

c.

4 ML

d.

2 ML

Question number: 411

» Rotational Motion » Torque

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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 = mg [where f is the friction force]

b.

F = N [where N is the normal reaction]

c.

N will not produce torque

d.

F will not produce torque

Question number: 412

» Laws of Motion » Force and Inertia

Edit
MCQ▾

Question

A stone of mass 1 kg tied to a light inextensible string of length L = 40/3 m is whirling in a circular path of radius L in a vertical plane. If the ratio of the maximum tension in the string to the minimum tension in the suing is 4 and if g is taken to be 10m/sec 2, the speed of the stone at the highest point of the circle is

Choices

Choice (4) Response

a.

10 m/sec

b.

5√2m/sec

c.

20 m/sec

d.

10√3m/Sec