NEET Physics: Questions 48 - 52 of 2142

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Question number: 48

MCQ▾

Question

Time taken by an object falling from rest to cover the height of h1 and h2 is respectively t1 and t2 then the ratio of ty to t2 is

Choices

Choice (4) Response

a.

h 1: 2h 2

b.

:

c.

2h 1: h 2

d.

h 1: h 2

Question number: 49

MCQ▾

Question

Which of the following pairs have same dimensions?

Choices

Choice (4) Response

a.

Energy and wavelength

b.

Torque and Energy

c.

Angular momentum and work

d.

Energy and Young’s modulus

Question number: 50

MCQ▾

Question

X = 3YZ 2 find dimensions of Fin (MKSA) system, if X and Z are the dimensions of capacity and magnetic field respectively

Choices

Choice (4) Response

a.

[M -3 L -2 T -4 A -1]

b.

[M -3 L -2 T 8 A 4]

c.

[M -3 L -2 T 4 A 4]

d.

[M L -2]

Question number: 51

MCQ▾

Question

From the top of a multistoried building 40m tall, a boy projects a stone vertically upwards with an initial velocity of 10 ms -1 such that it eventually falls to the ground.

(1) After 4 s the stone will strike the ground

(2) After 2 s the stone will pass through the point from where it was projected

(3) Its velocity when it strikes the ground is 30 m/s

(4) Its velocity when it strikes the ground is 40 m/s

Choices

Choice (4) Response

a.

1, 2 and 3

b.

2 and 4

c.

1 and 3

d.

1 and 2

Question number: 52

MCQ▾

Question

Number of particles crossing unit area perpendicular to X-axis in unit time is given by n =-D n 2 - n 1 x 2 - x 1

, where n1 and n2 are number of particles per unit volume in the position x1 and x2. Find dimensions of D called as diffusion constant.

Choices

Choice (4) Response

a.

[M 0 L T 2]

b.

[M0 L2 T -4]

c.

[M 0 L 2 T -1]

d.

[M 0 L T -3]

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