Velocity v and acceleration a in two systems of units 1 and 2 are related as v 2 = n m 2 v 1 and a 2 = a 1 m n respectively. Here m and n are constants. The relations for distance and time in two systems respectively are

n 3 m 3 L 1 = L 2 and n 2 m T 1 = T 2

L 1 = n 4 m 2 L 2 and T 1 = n 2 m T 2

L 1 = n 2 m L 2 and T 1 = n 4 m 2 T 2

n 2 m L 1 = L 2 and n 4 m 2 T 1 = T 2

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

Light year is a unit of

50% studentsanswered this correctly

Important Questions on Measurements

EASY

Science>Physics>Measurements>Unit of Measurement

In SI units,

kg m^{2} s^{- 2}

is equivalent to which of the following?

EASY

Science>Physics>Measurements>Unit of Measurement

Pick out the stranger

MEDIUM

Science>Physics>Measurements>Unit of Measurement

Velocity

(v)

and acceleration

(a)

in two systems of units

1

and

2

are related as

v_{2} = \frac{n}{m^{2}} v_{1}

and

a_{2} = \frac{a_{1}}{m n}

respectively. Here

m

and

n

are constants. The relations for distance and time in two systems respectively are

EASY

Science>Physics>Measurements>Unit of Measurement

The dimension of light year

EASY

Science>Physics>Measurements>Unit of Measurement

If $E$ and $H$ represents the intensity of electric field and magnetizing field respectively, then the unit of $\frac{E}{H}$ will be:

EASY

Science>Physics>Measurements>Unit of Measurement

Match List I with List II

	List I		List II
A	Torque	I	$kg m^{- 1} s^{- 2}$
B	Energy density	II	$kg m s^{- 1}$
C	Pressure gradient	III	$kg m^{- 2} s^{- 2}$
D	Impulse	IV	$kg m^{2} s^{- 2}$

Choose the correct answer from the options given below :

MEDIUM

Science>Physics>Measurements>Unit of Measurement

A huge circular arc of length $4.4 ly$ subtends an angle $4 s$ at the centre of the circle. How long it would take for a body to complete $4$ revolution if its speed is $8 AU$ per second?
Given : $1 ly = 9.46 \times 10^{15} m$

$1 AU = 1.5 \times 10^{11} m$

EASY

Science>Physics>Measurements>Unit of Measurement

Which of the following is not a unit of time?

EASY

Science>Physics>Measurements>Unit of Measurement

The angular speed of a fly-wheel making

180 rpm

is ________

EASY

Science>Physics>Measurements>Unit of Measurement

The distance of the Sun from earth is

1.5 \times 10^{11} m

and its angular diameter is

2000''

when observed from the earth. The diameter of the Sun will be

EASY

Science>Physics>Measurements>Unit of Measurement

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>Measurements>Unit of Measurement

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)	$kg m^{2} s^{- 2}$