NEET Physics: Questions 443 - 446 of 2142

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Question number: 443

MCQ▾

Question

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.

637 N-m

c.

440 N-m

d.

350 N-m

Question number: 444

MCQ▾

Question

A point Q lies on the perpendicular bisector of an electrical dipole of dipole moment p. If the distance of Q from the dipole is r (much larger than the size of the dipole), then electric field at Q is proportional to

Choices

Choice (4) Response

a.

p -1 and r -2

b.

p and r -2

c.

p and r -3

d.

P 2 and r -3

Question number: 445

MCQ▾

Question

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

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 446

MCQ▾

Question

Students I, II and III perform an experiment for measuring the acceleration due to gravity (g) using a simple pendulum. They use different lengths of the pendulum and/or record time for different number of oscillations. The observations are shown in the table. Least count for length = 0.1 cm

 Student Length of the pendulum (cm) No. of oscillations (n) Total time for (n) oscillations (s) Time Period (s) I 64.0 8 128.0 16.0 II 64.0 4 64.0 16.0 III 20.0 4 36.0 9.0

If E I, E II and E III are the percentage errors in g, i. e. , ( for students, I, II and III, respectively, then

Choices

Choice (4) Response

a.

E I = 0

b.

E I = E II

c.

E I is minimum

d.

E II is maximum

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