NEET Physics: Questions 73 - 77 of 2098

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Question number: 73

» Physics and Measurement » Errors in Measurement

MCQ▾

Question

The percentage errors in the measurement of mass and speed are 2 % and 3 % respectively. How much will be the maximum error in the estimation of the kinetic energy obtained by measuring mass and speed?

Choices

Choice (4) Response

a.

1%

b.

5 %

c.

8 %

d.

11 %

Question number: 74

» Physics and Measurement » Accuracy and Precision of Measuring Instruments

MCQ▾

Question

The number of significant figures in all the given numbers 25.12, 2009, 4.156 and l. 217 x 10 - 4 is

Choices

Choice (4) Response

a.

2

b.

3

c.

4

d.

1

Question number: 75

» Kinematics » Motion in a Straight Line

MCQ▾

Question

A particle of mass m moves on the x-axis as follows: it starts from rest at t = 0 from the point x - 0 and comes to rest at t = 1 at the point x = 1. No other information is available about its motion at intermediate time (0 < t < 1). If a denotes the instantaneous acceleration of the particle, then

Choices

Choice (4) Response

a.

A cannot remain positive for all t in the interval 0 < t < l

b.

(α)

Must be > 4 at some point or points in its path

c.

(α)

Cannot exceed 2 at any point in its path

d.

(α)

= 2 at any point in its path.

Question number: 76

» Physics and Measurement » SI Units

MCQ▾

Question

10 the unit of Stefan’s constant a is

Choices

Choice (4) Response

a.

Wm 2 K -4

b.

Wm -2 K 4

c.

Wm -2 K -4

d.

Wm -2 K -1

Question number: 77

» Physics and Measurement » Errors in Measurement

MCQ▾

Question

A physical parameter a can be determined by measuring the parameters b, c, d and e using the relation a = bαcβdγeδ

If the maximum errors in the measurement of b, c, d and e are b1 %, c1 %, d1 %, and e1 %, then the maximum error in the value of a determined by the experiment is

Choices

Choice (4) Response

a.

(b 1 + c 1 - d 1 - e 1) %

b.

(b 1 + c 1 + d 1 + e 1) %

c.

(b 1 + c 1 - d 1 - e 1) %

d.

(b1 + c 1 + d1 + e1) %

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