NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 59 - 63 of 2320

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Question number: 59

Edit
MCQ▾

Question

A body falls from a height h = 200 m. The ratio of distance travelled in each 2 second during t = 0 to t = 6 second of the journey is

Choices

Choice (4)Response

a.

1: 2: 3

b.

1: 3: 5

c.

1: 2: 4

d.

1: 4: 9

Question number: 60

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MCQ▾

Question

SI unit of permittivity is

Choices

Choice (4)Response

a.

C 2 m -2 N -1

b.

C 2 m 2 N 2

c.

C 2 m 2 N -2

d.

C 1 m 2 N -2

Question number: 61

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MCQ▾

Question

A stone is dropped from a miner of height h and it reaches after t seconds on earth. From the same miner if two stones are thrown (one upwards and other downwards) with the same velocity u and they reach the earth surface after t 1 and t 2 seconds respectively, then

Choices

Choice (4)Response

a.

t = t 1 - t 2

b.

t =

c.

t =

d.

t =

Question number: 62

Edit
Assertion-Reason▾

Assertion (Ꭺ)

Displacement of a body may be zero when distance travelled by it is not zero.

Reason (Ꭱ)

The displacement is the longest distance between initial and final position.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are false

b.

Ꭺ is true but Ꭱ is false

c.

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

d.

Ꭺ is false but Ꭱ is true

Question number: 63

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MCQ▾

Question

if a particle travels a linear distance at speed v 1 and comes back along the same track at speed v 2.

(1) Its average speed is arithmetic mean (v 1 + v 2) / 2

(2) Its average speed is harmonic mean 2 v 1 v 2 / (v 1 + v 2) /2

(3) Its average speed is geometric mean √v 1 v 2

(4) Its average velocity is zero

Choices

Choice (4)Response

a.

1 and 2

b.

1,2 and 3

c.

2 and 4

d.

1 and 3

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