Alpha Question Bank for Medical: Physics>Chapter 3 - Physical World and Measurement>Exercise-3>Q 21

EASY

NEET

IMPORTANT

Earn 100

The diameter and height of a cylinder are measured by a meter scale to be $12 .6 \pm 0 .1 cm$ and $34 .2 \pm 0 .1 cm$ , respectively. What will be the value of its volume in appropriate significant figures?

50% studentsanswered this correctly

Important Questions on Physical World and Measurement

EASY

NEET

IMPORTANT

Alpha Question Bank for Medical: Physics>Chapter 3 - Physical World and Measurement>Exercise-3>Q 22

In a simple pendulum, experiment for determination of acceleration due to gravity

(g)

, time taken for

20

oscillations is measured by using a watch of

1

second least count. The mean value of time taken comes out to be

30 s

. The length of pendulum is measured by using a meter scale of least count

1 m m

and the value obtained

55.0 c m

. The percentage error in the determination of

g

is close to

MEDIUM

NEET

IMPORTANT

Alpha Question Bank for Medical: Physics>Chapter 3 - Physical World and Measurement>Exercise-3>Q 23

In the density measurement of a cube, the mass and edge length are measured as

(10 .00 \pm 0 .10) kg

and

(0 .10 \pm 0 .01) m

, respectively. The error in the measurement of density is

EASY

NEET

IMPORTANT

Alpha Question Bank for Medical: Physics>Chapter 3 - Physical World and Measurement>Exercise-3>Q 24

The area of a square is

5.29 {cm}^{2}

. The area of

7

such squares taking into account the significant figures is

EASY

NEET

IMPORTANT

Alpha Question Bank for Medical: Physics>Chapter 3 - Physical World and Measurement>Exercise-4>Q 1

The equation of state of some gases can be expressed as

(p + \frac{a}{v^{2}}) (V - b) = R T

. Here

P

is the pressure,

V

is the volume,

T

is the absolute temperature and

a, b, R

are constants. The dimensions of

' a'

are

MEDIUM

NEET

IMPORTANT

Alpha Question Bank for Medical: Physics>Chapter 3 - Physical World and Measurement>Exercise-4>Q 2

If

V

, denotes the potential difference across the plates of a capacitor of capacitance

C,

the dimensions of

C V^{2}

are

EASY

NEET

IMPORTANT

Alpha Question Bank for Medical: Physics>Chapter 3 - Physical World and Measurement>Exercise-4>Q 3

In the relation ;

P = \frac{α}{β} e^{- \frac{α Z}{k θ}}

,

P

is pressure,

Z

is distance,

k

is Boltzman constant and

θ

is the temperature. The dimensions of

β

will be:

MEDIUM

NEET

IMPORTANT

Alpha Question Bank for Medical: Physics>Chapter 3 - Physical World and Measurement>Exercise-4>Q 4

The equation

(p + \frac{a}{V^{2}}) (V - b)

= constant. The units of

a

are:

MEDIUM

NEET

IMPORTANT

Alpha Question Bank for Medical: Physics>Chapter 3 - Physical World and Measurement>Exercise-4>Q 5

If the acceleration due to gravity is

10 m s^{- 2}

and the units of length and time are changed in kilometer and hour respectively, the numerical value of the acceleration is