Free Printable units and dimensions

1.

Which of the following is the unit of latent heat:

a)

J

b)

J mol^-1

c)

J Kg^-1

d)

J Kg^-1 mol^-1

2.

Unit of angular acceleration is SI system:

a)

N kg^-1

b)

m sec^-2

c)

rad sec^-2

d)

km kg^-1

3.

erg m^-1 can be the unit of the measure of

a)

force

b)

momentum

c)

power

d)

acceleration

4.

The unit of force and length are doubled, the unit of energy will be :

a)

1/4 times

b)

1/2 times

c)

2 times

d)

4 times

5.

Length cannot be measured by

a)

fermi

b)

debye

c)

micron

d)

light year

6.

If force (F), acceleration (a) and time (T) are used as the fundamental units, the dimensional formula for length will be:

a)

F⁰ a T²

b)

F a⁰ T²

c)

F a² T⁰

d)

F a T

7.

Angular momentum has the same dimensions as :

a)

Planck's constant

b)

Universal gravitational constant

c)

Rydberg constant

d)

Boltzmann constant

8.

If P is the pressure , ρ is the density and E is the energy of a bubble , the quantity P^-5/6 ρ^1/2 E^1/3 has got the dimensions of :

a)

length

b)

mass

c)

time

d)

velocity

9.

the mass per unit volume has the dimensions of ......

a)

$M\ L^{-2}$

b)

$M\ L^{-3}$

c)

$M$

d)

$M^{\ -1}\ L^{ }$

10.

There are______ fundamental quantities

a)

6

b)

5

c)

9

d)

7

11.

the dimensions of force are

a)

$M\ L^{-1}\ T\ ^{-2}$

b)

$M\ L^{-2}\ T\ ^{-2}$

c)

$M\ L^2\ T\ ^{-2}$

d)

$M\ L^{ }\ T\ ^{-2}$

12.

1 micrometer equals to

a)

10 $-9$ m

b)

10 $-3$ m

c)

10 $-6$ m

d)

10 $-1$ m

13.

The below given distance units are arranged in an order of

mm, nm, km, m

a)

Smallest to largest

b)

Largest to smallest

c)

Not arranged in any correct order

d)

All are same

14.

The unit of mass in F. P. S system is

a)

Pound

b)

Foot

c)

Second

d)

Meter

15.

Which one of these options is NOT a derived quantity?

a)

Area

b)

Volume

c)

Density

d)

Current

16.

What is the SI unit of speed?

a)

m/s

b)

cm/s

c)

km/hour

d)

kg/m

17.

What is the DIMENSION of acceleration?

a)

L³

b)

[L/T]

c)

[L/T²]

d)

LT

18.

Which of the following is a derived unit?

a)

metre

b)

second

c)

kilogram

d)

joule

19.

You know 1000 mg = 1 g. Convert 2.5 grams into milligrams.

a)

25 mg

b)

25,000 mg

c)

250 mg

d)

2500 mg

20.

the dimensions of energy are

a)

$M\ L^{-1}\ T\ ^{-2}$

b)

$M\ L^{-2}\ T\ ^{-2}$

c)

$M\ L^2\ T\ ^{-2}$

d)

$M\ L^2\ T\ ^{-1}$

21.

When quantities with units are added or subtracted, they need to be expressed in the _____________ unit.

a)

Different

b)

Same

c)

Derived

d)

Fundamental

22.

Find out the dimensionless quantity

a)

Pressure

b)

Reynolds Number

c)

Viscosity

d)

Density

23.

The velocity of a particle v at an instant 't' is given by

v = at + bt². The dimensions of b is

a)

[L]

b)

[LT^-1]

c)

[LT^-2]

d)

[LT^-3]

24.

A quantity which can be _________ is called physical quantity

a)

Depends

b)

Measured

c)

Not measured

d)

None of these

25.

_____ is a standard which is used for the measurement of physical quantity

a)

Numerical value

b)

Unit

c)

Area

d)

Volume

26.

Physical quantity =______* unit

a)

Numerical value

b)

Length

c)

Area

d)

Density

27.

Derived units are the units of ______ physical quantities which are expressed in terms of fundamental units

a)

Fundamental

b)

Derived

c)

Base

d)

Supplementary

28.

Physical quantities which are independent of other physical quantities are called as

a)

Derived physical quantities

b)

Fundamental physical quantities

c)

Supplementary physically quantities

d)

None of these

29.

The unit of plane angle is

a)

Steredian

b)

Radian

c)

Mol

d)

Candela

30.

The unit of plane angle is

a)

Steredian

b)

Radian

c)

Mol

d)

Candela

31.

The unit of temperature is

a)

Kilogram

b)

Second

c)

Meter

d)

Kelvin

32.

The symbol for amount of substance is

a)

mol

b)

Mole

c)

Candela

d)

All the above

33.

What is the DIMENSION of acceleration?

a)

L³

b)

[L/T]

c)

[L/T²]

d)

LT

34.

The physical quantity having units of mass is

a)

Inertia

b)

Density

c)

Momentum

d)

Volume

35.

A light year is a unit for

a)

Time

b)

speed of light

c)

length

d)

year

36.

Area, volume, speed, force etc., are examples of

a)

Fundamental unit

b)

Fundamental quantity

c)

Derived unit

d)

Derived quantity

37.

If U1 and U2 are the units used to measure the same physical quantity and N1, N2 are their numerical values, then the relation between them......

a)

N1U1=N2U2

b)

N1N2=U1U2

c)

N1/N2 = U1/U2

d)

NiUI+N2U2

38.

Which of the following is a derived?

a)

temperature

b)

moles

c)

velocity

d)

current

39.

What SI unit is used to measure electric current?

a)

seconds

b)

amperes

c)

Kelvin

d)

mole

40.

SI stands for ___.

a)

Sports Illustrated

b)

Scientific Notation

c)

International System (of measurements)

d)

Instructional System (of measurements)

41.

Which of the following pairs of physical quantity and SI unit is correct ?

a)

Mass - SI unit : Gram

b)

Time - SI unit : Hour

c)

Electric current - SI unit : Volt

d)

Temperature - SI unit : Kelvin

42.

What is the derived unit for energy?

a)

Watts

b)

Kilojoules

c)

joules

d)

kilograms per cubic meter

43.

Which ones are fundamental units?

a)

Length

b)

Force

c)

Luminous Intensity

d)

Volume

e)

Electric Current

44.

Which ones are system of units?

a)

C.G.S.

b)

S.T.P.

c)

F.P.S.

d)

M.K.S.

e)

K.C.S.

45.

Scientific notation of: 0.000345

a)

3.45x10⁴

b)

3.45x10^-4

c)

34.5x10⁴

d)

3.45x10^-5

46.

10mm is equal to

a)

1cm

b)

1m

c)

1dm

d)

10cm

47.

The unit m³ is used to express

a)

volume

b)

mass

c)

length

d)

density

48.

The dimensions of Kinetic energy is same as that of

a)

Force

b)

Pressure

c)

Work

d)

Momentum

49.

Which of the following pairs has the same dimensions?

a)

Specific Heat and Latent Heat

b)

Impulse and Momentum

c)

Surface Tension and Force

d)

Moment of Inertia and Torque

50.

Dimensional formula of density is

a)

[M¹L²T⁰]

b)

[M¹L^-3T⁰]

c)

[M¹L¹T⁰]

units and dimensions

Total questions: 50

Worksheet time: 35mins

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