# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 74 - 78 of 2320

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## Question number: 74

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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.

8 %

c.

5 %

d.

11 %

## Question number: 75

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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.

1

b.

2

c.

3

d.

4

## Question number: 76

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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.

Cannot exceed 2 at any point in its path

c.

= 2 at any point in its path.

d.

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

## Question number: 77

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MCQ▾

### Question

10 the unit of Stefan’s constant a is

### Choices

Choice (4)Response

a.

Wm -2 K -1

b.

Wm -2 K -4

c.

Wm 2 K -4

d.

Wm -2 K 4

## Question number: 78

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MCQ▾

### Question

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

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.

(b1 + c 1 + d1 + e1) %

d.

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

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