Rotational Motion-Torque [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 16 - 21 of 36

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Question 16

Question MCQ▾

An automobile engine develops 100 kW when rotating at a speed of 1500 rev/min. What torque does it deliver?

Choices

Choice (4)Response

a.

531 N-m

b.

350 N-m

c.

440 N-m

d.

637 N-m

Edit

Question 17

Question MCQ▾

A torque of 20 N-m is applied on a 5 kg wheel whose moment of inertia is 2kg-m2 for 10 sec. The angle covers by the wheel in 10 sec will be

Choices

Choice (4)Response

a.

750 rad

b.

500 rad

c.

3000 rad

d.

6000 rad

Edit

Question 18

Question MCQ▾

A thin wire of length L and uniform linear mass density ρ is bent into a circular loop with center at O as shown in figure. The moment of inertia of the loop about the axis XX is

Circular Loop of Wire of Length L

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 19

Question MCQ▾

A flywheel of mass 25 kg has a radius of 0.3 m. What force should be applied tangentially to the rim of the flywheel so that it acquires an angular acceleration of 4 rad s-2?

Choices

Choice (4)Response

a.

11.2 N

b.

6.8 N

c.

2.6 N

d.

7.5 N

Edit

Question 20

Question MCQ▾

The torque required to stop a wheel of moment of inertia from a speed of 40 rad s-1 in 10 s is,

Choices

Choice (4)Response

a.

8 ⨯ 10-3 Nm

b.

8 Nm

c.

0.8 Nm

d.

0.08 Nm

Edit

Question 21

Question Assertion-Reason▾

Assertion(Ꭺ)

The force of fiction in the case of a disc rolling without slipping down an inclined plane is .

Reason(Ꭱ)

When the disc rolls without slipping, friction is required because for rolling condition velocity of point of contact is zero.

Choices

Choice (4)Response

a.

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

b.

Ꭺ is true but Ꭱ is false

c.

Ꭺ is false but Ꭱ is true

d.

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

Edit