Match the physical quantities with their correct SI units. List-I List-II (A) Planck's constant (I) kg m s - 2 (B) Torque (II) kg - 1 m 3 (C) Weight (III) m 2 kg s - 1 (D) Specific volume (IV) kg m 2 s - 2 The correct match is

A = III , B = IV , C = I , D = II

A = II , B = IV , C = I , D = III

A = IV , B = I , C = II , D = III

A = II , B = III , C = I , D = IV

EASY

Earn 100

$1 m$ = $\times 10^{- 16} ly$ (Up to correct significant figures.)

50% studentsanswered this correctly

Important Questions on Units and Measurements

EASY

Physics>Mechanics>Units and Measurements>Measurement of Time

The nearest star to our solar system is

4.3

light years away. The distance of this star in Parsec is (Mean distance between the earth and the sun

= 1.5 \times 10^{11} m

and one light year

= 9.46 \times 10^{15} m)

MEDIUM

Physics>Mechanics>Units and Measurements>Measurement of Time

A train leaves station

A

8 am

and reaches station

B

12 noon

A

car leaves station

B

8 : 30 am

and reaches station

A

at the same time when the train reaches station

B

. At what time do they meet?

MEDIUM

Physics>Mechanics>Units and Measurements>Measurement of Time

The angular diameter of a planet measured from earth is

90 " .

If the diameter of the planet is

π \times 10^{6} m,

then its distance from the earth is

MEDIUM

Physics>Mechanics>Units and Measurements>Measurement of Time

The period of oscillation of a simple pendulum is

T = 2 π \sqrt{\frac{l}{g}} .

Measured value of

l

20.0 cm

, known to

1 mm

accuracy and time for

100

oscillations of the pendulum is found to be

90 s

using a wristwatch of

1 s

resolution. The accuracy in the determination of

g

MEDIUM

Physics>Mechanics>Units and Measurements>Measurement of Time

A boy increases his speed to

\frac{9}{5}

times of his original speed. By this he reaches his school

30 minutes

before the usual time. How much time he takes usually?

EASY

Physics>Mechanics>Units and Measurements>Measurement of Time

Convert $- 40 ° F$ into Celsius.

EASY

Physics>Mechanics>Units and Measurements>Measurement of Time

Walking at

{(\frac{4}{5})}^{th}

of his usual speed, a man is

12 minutes

late for his office. What is the usual time taken by him to cover that distance?

MEDIUM

Physics>Mechanics>Units and Measurements>Measurement of Time

Consider a particle moving along the positive direction of

X

-axis. The velocity of the particle is given by

v = α \sqrt{x}

(

α

is a positive constant). At time

t = 0

, if the particle is located at

x = 0

, the time dependence of the velocity and the acceleration of the particle are respectively.

EASY

Physics>Mechanics>Units and Measurements>Measurement of Time

A takes

2 hours 30 minutes

more than B to walk

40 km

. If A doubles his speed, then he can make it in

1 hour

less than B. How much time (in

hours

) does A require for walking a

40 km

distance?

EASY

Physics>Mechanics>Units and Measurements>Measurement of Time

If Shivan walks at the rate of

19 kmph

. How much time (in

\min

) will he take to cover

665 m

MEDIUM

Physics>Mechanics>Units and Measurements>Measurement of Time

For the four sets of three measured physical quantities as given below. Which of the following options is correct?

(i)

A_{1} = 24.36, B_{1} = 0.0724, C_{1} = 256.2

(i i)

A_{2} = 24.44, B_{2} = 16.082, C_{2} = 240.2

(i i i)

A_{3} = 25.2, B_{3} = 19.2812, C_{3} = 236.183

(i v)

A_{4} = 25, B_{4} = 236.191, C_{4} = 19.5

MEDIUM

Physics>Mechanics>Units and Measurements>Measurement of Time

Walking at

60 %

of his usual speed, a man reaches his destination

1 hour 40 minutes

late. His usual time (in

hours

) to reach the destination is:

EASY

Physics>Mechanics>Units and Measurements>Measurement of Time

The angle of

1'

(minute of arc) in radian is nearly equal to

EASY

Physics>Mechanics>Units and Measurements>Measurement of Time

The temperature of an object is $60 ° C .$ Its value in Fahrenheit scale is

EASY

Physics>Mechanics>Units and Measurements>Measurement of Time

The dimension of light year

HARD

Physics>Mechanics>Units and Measurements>Measurement of Time

A person in front of a mountain is beating a drum at the rate of

40

per minute and hears no distinct echo. If the person moves

90 m

closer to the mountain, he has to beat the drum at

60

per minute to not hear any distinct echo. The speed of sound is

EASY

Physics>Mechanics>Units and Measurements>Measurement of Time

Match the physical quantities with their correct $SI$ units.

	List-I		List-II
(A)	Planck's constant	(I)	$kg m s^{- 2}$
(B)	Torque	(II)	${kg}^{- 1} m^{3}$
(C)	Weight	(III)	$m^{2} kg s^{- 1}$
(D)	Specific volume	(IV)	$kg m^{2} s^{- 2}$

The correct match is

HARD

Physics>Mechanics>Units and Measurements>Measurement of Time

A man is walking at a speed of

12 km / hour

. After every kilometer he takes rest for

4 minutes

. How much time (in minutes) will he take to cover a distance of

8 kilometers

MEDIUM

Physics>Mechanics>Units and Measurements>Measurement of Time

A and B are at a distance of

1.7 km

apart and they start running towards each other at a speed of

8 m / s

and

9 m / s

respectively. After how much time, will they meet each other?

EASY

Physics>Mechanics>Units and Measurements>Measurement of Time

Which of the following is not a unit of time?

1 m = ×10-16 ly (Up to correct significant figures.)

Important Questions on Units and Measurements

Learn and Prepare for any exam you want !

$1 m$ = $\times 10^{- 16} ly$ (Up to correct significant figures.)