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

State whether the given statement is true or false.

A cerium atomic clock is used at the National Physics Laboratory $(NPL)$ , New Delhi to maintain the Indian Standard of time.

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Important Questions on Motion and Time

MEDIUM

Science>Physics>Motion and Time>Measuring 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

Science>Physics>Motion and Time>Measuring 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

Science>Physics>Motion and Time>Measuring 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

EASY

Science>Physics>Motion and Time>Measuring Time

The dimension of light year

MEDIUM

Science>Physics>Motion and Time>Measuring 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

Science>Physics>Motion and Time>Measuring Time

The angle of

1'

(minute of arc) in radian is nearly equal to

EASY

Science>Physics>Motion and Time>Measuring 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?

EASY

Science>Physics>Motion and Time>Measuring 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)

EASY

Science>Physics>Motion and Time>Measuring 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

Science>Physics>Motion and Time>Measuring Time

If Shivan walks at the rate of

19 kmph

. How much time (in

\min

) will he take to cover

665 m

MEDIUM

Science>Physics>Motion and Time>Measuring 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.

MEDIUM

Science>Physics>Motion and Time>Measuring 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

Science>Physics>Motion and Time>Measuring 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

MEDIUM

Science>Physics>Motion and Time>Measuring 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

HARD

Science>Physics>Motion and Time>Measuring 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

Science>Physics>Motion and Time>Measuring Time

The prefix atto means

EASY

Science>Physics>Motion and Time>Measuring Time

A spherometer has

20

threads per

cm

. Its circular scale has

100

divisions. The least count of the sphere is

HARD

Science>Physics>Motion and Time>Measuring 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

Science>Physics>Motion and Time>Measuring 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

Science>Physics>Motion and Time>Measuring Time

Which of the following is not a unit of time?

State whether the given statement is true or false. A cerium atomic clock is used at the National Physics Laboratory NPL, New Delhi to maintain the Indian Standard of time.

Important Questions on Motion and Time

Learn and Prepare for any exam you want !

State whether the given statement is true or false.

A cerium atomic clock is used at the National Physics Laboratory $(NPL)$ , New Delhi to maintain the Indian Standard of time.