# NEET Physics: Questions 93 - 96 of 2098

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## Question number: 93

MCQ▾

### Question

P represents radiation pressure, c represents speed of light and S represents radiation energy striking unit area per sec. The non-zero integers x, y, z such that P x S y c z is dimensionless are

### Choices

Choice (4) Response

a.

x = 1

b.

y = 1

c.

z = 1

d.

x=-1

## Question number: 94

Assertion-Reason▾

### Assertion (Ꭺ)

The position-time graph of a uniform motion in one dimension of a body can have negative slope.

### Reason (Ꭱ)

When the speed of body decreases with time, the position-time graph of the moving body has negative slope.

### Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is true but Ꭱ is false

d.

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

## Question number: 95

MCQ▾

### Question

A small steel ball of radius r is allowed to fall under gravity through a column of a viscous liquid of coefficient of viscosity η. After some time the velocity of the ball attains a constant value known as terminal velocity vT The terminal velocity depends on (i) the mass of the ball m, (ii) n, (iii) r and (iv) acceleration due to gravity g. Which of the following relations is dimensionally correct?

### Choices

Choice (4) Response

a.

vT

b.

vT

c.

vT rmg

d.

vT

## Question number: 96

MCQ▾

### Question

The mean time period of second’s pendulum is 2.00s and means absolute error in the time period is 0.05s. To express maximum estimate of error, the time period should be written as

### Choices

Choice (4) Response

a.

(2.00 + 0.025) s

b.

(2.00 + 0.05) s

c.

(2.00 - 0.01) s

d.

None of the above