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

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Physical quantities are classified into two- fundamental and quantities.

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Important Questions on Units and Measurements

EASY

Physics>Mechanics>Units and Measurements>Physical Quantities

Order of magnitude of a physical quantity is the

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Physics>Mechanics>Units and Measurements>Physical Quantities

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.

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Physics>Mechanics>Units and Measurements>Physical Quantities

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

EASY

Physics>Mechanics>Units and Measurements>Physical Quantities

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

EASY

Physics>Mechanics>Units and Measurements>Physical Quantities

The units nanometer and picometer are related as,

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Physics>Mechanics>Units and Measurements>Physical Quantities

The commutator bracket

[X Y, Z]

is expanded as

EASY

Physics>Mechanics>Units and Measurements>Physical Quantities

Which of the following is not a derived physical quantity?

EASY

Physics>Mechanics>Units and Measurements>Physical Quantities

Match the following?

Column -I		Column -II
(a)	Conductance	(i)	Gray
(b)	Magnetic Induction	(ii)	Lumen
(c)	Absorbed dose	(iii)	Tesla
(d)	Luminous flux	(iv)	Siemens

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Physics>Mechanics>Units and Measurements>Physical Quantities

If a planet X has the same radius as that of the earth but if its mass is double that of earth then find the acceleration on the surface of planet X.

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Physics>Mechanics>Units and Measurements>Physical Quantities

Explain why the value of $g$ differs while moving from poles to equator on the surface of the earth. State how would its value change on moving.

(a) towards the centre of the earth

(b) away from the earth

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Physics>Mechanics>Units and Measurements>Physical Quantities

Height at which value of 'g' becomes one-fourth to that on earth is

EASY

Physics>Mechanics>Units and Measurements>Physical Quantities

The value of

g

is a universal constant.

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Physics>Mechanics>Units and Measurements>Physical Quantities

The value of acceleration due to gravity

HARD

Physics>Mechanics>Units and Measurements>Physical Quantities

How does the value of g vary as

(a) one moves at higher altitudes from the surface of earth

(b) one moves towards the centre of earth from the surface of earth?

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Physics>Mechanics>Units and Measurements>Physical Quantities

The SI unit of mass is _____.

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Physics>Mechanics>Units and Measurements>Physical Quantities

The weight of an object

EASY

Physics>Mechanics>Units and Measurements>Physical Quantities

Is energy a vector quantity?

MEDIUM

Physics>Mechanics>Units and Measurements>Physical Quantities

A planet will have large value of

g

which has large value of mass and small value of radius.

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Physics>Mechanics>Units and Measurements>Physical Quantities

Where will a person weigh more, in Ooty or in Delhi?

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Physics>Mechanics>Units and Measurements>Physical Quantities

Why is the weight of a body lesser at the equator than at poles?

Physical quantities are classified into two- fundamental and quantities.

Important Questions on Units and Measurements

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