Match the Column I with Column II. Column - I (Event) Column - II (Time interval (in s )) ( A ) Lifetime of an excited state of an atom ( p ) 10 17 ( B ) Average human life-span ( q ) 10 11 ( C ) Age of Egyptian pyramids ( r ) 10 9 ( D ) Age of the universe ( s ) 10 - 8

A – s , B – r , C – q , D – p

A – p , B – q , C – r , D – s

A – q , B – p , C – s , D – r

A – r , B – s , C – p , D – q

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Earn 100

What is tensor quantity?

Important Questions on Units and Measurements

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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

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

EASY

Physics>Mechanics>Units and Measurements>Physical Quantities

Which of the following is not a derived physical quantity?

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Physics>Mechanics>Units and Measurements>Physical Quantities

A plano-convex lens of unknown material and unknown focal length is given. With the help of a spherometer we can measure the

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Physics>Mechanics>Units and Measurements>Physical Quantities

watt

is,

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Physics>Mechanics>Units and Measurements>Physical Quantities

Newton \times second

is the unit of:

EASY

Physics>Mechanics>Units and Measurements>Physical Quantities

The ratio of one micron to one nanometer is

MEDIUM

Physics>Mechanics>Units and Measurements>Physical Quantities

Match the Column I with Column II.

	Column - I (Event)		Column - II (Time interval (in $s$ ))
$(A)$	Lifetime of an excited state of an atom	$(p)$	$10^{17}$
$(B)$	Average human life-span	$(q)$	$10^{11}$
$(C)$	Age of Egyptian pyramids	$(r)$	$10^{9}$
$(D)$	Age of the universe	$(s)$	$10^{- 8}$

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Physics>Mechanics>Units and Measurements>Physical Quantities

Which one of the following is a fundamental quantity?

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Physics>Mechanics>Units and Measurements>Physical Quantities

Name the quantities which have no dimension but variable.

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Physics>Mechanics>Units and Measurements>Physical Quantities

Young’s modulus of a material has the same unit as

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Physics>Mechanics>Units and Measurements>Physical Quantities

The unit of potential energy is

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Physics>Mechanics>Units and Measurements>Physical Quantities

Unit of self inductance is

MEDIUM

Physics>Mechanics>Units and Measurements>Physical Quantities

The distance between centres of moon and the earth is about

60

times the radius of the earth. What will be diameter of the earth (approximately in degrees) as seen from the moon?

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Physics>Mechanics>Units and Measurements>Physical Quantities

Does ratio of same quantity depends upon the system of unit used?

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Physics>Mechanics>Units and Measurements>Physical Quantities

Which of the following ratios express pressure?

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Physics>Mechanics>Units and Measurements>Physical Quantities

Name the fundamental quantities in mechanics?

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Physics>Mechanics>Units and Measurements>Physical Quantities

Ampere - hour

is a unit of which of the following quantities.

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Physics>Mechanics>Units and Measurements>Physical Quantities

Erg m^{- 1}

can be the unit for measuring:

EASY

Physics>Mechanics>Units and Measurements>Physical Quantities

Which of the following represents a

volt

What is tensor quantity?

Important Questions on Units and Measurements

Learn and Prepare for any exam you want !

What is tensor quantity?