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.

What is the basic unit for length

a)

meter

b)

centemeters

c)

yards

d)

kilograms

5.

What is the base unit for mass

a)

pounds

b)

kilograms

c)

grams

d)

dollars

6.

What is the basic unit for time

a)

seconds

b)

minutes

c)

hours

d)

days

7.

Unit of angular acceleration is SI system:

a)

N kg^-1

b)

m sec^-2

c)

rad sec^-2

d)

km kg^-1

8.

Length cannot be measured by

a)

fermi

b)

debye

c)

micron

d)

light year

9.

the dimensions of energy are

a)

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

b)

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

c)

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

d)

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

10.

the dimensions of energy are

a)

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

b)

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

c)

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

d)

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

11.

the dimensions of viscosity coefficient are

a)

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

b)

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

c)

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

d)

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

12.

the following equation is dimensionally

$v^2\ =v_0^2\ +2\ a\ d$
Where :
v is the velocity
a is the acceleration
d is the distance

a)

Correct

b)

incorrect

13.

if the force depends upon pressure , area , and the viscosity coefficient , Find the equation of the force

a)

$F=P\ A\ \eta$

b)

$F=\frac{P}{A\ \eta}$

c)

$F=\frac{P}{A}$

d)

$F=\frac{\eta\ A}{P}$

14.

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

a)

$M\ L^{-2}$

b)

$M\ L^{-1}$

c)

$M$

d)

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

15.

What is the DIMENSION of length?

a)

[M]

b)

[L]

c)

[T]

d)

[l]

16.

Which one of these options is NOT a derived quantity?

a)

Area

b)

Volume

c)

Density

d)

Temperature

17.

What is the SI unit of speed?

a)

m/s

b)

cm/s

c)

km/hour

d)

kg/m

18.

1 nm (nano-meter) = .... m

a)

1 x 10^-12

b)

1 x 10⁹

c)

1 x 10^-9

d)

1 x 10¹²

19.

What is the DIMENSION of acceleration?

a)

L³

b)

[L/T]

c)

[L/T²]

d)

LT

20.

Which one is not a dimension?

a)

Length

b)

Mass

c)

Time

d)

Kelvin

21.

Which one is a unit?

a)

Feet

b)

Second

c)

Square meter

d)

All of the mentioned

22.

The below given distance units are arranged in an order of

nm, mm, dm, m, Km

a)

Smallest to largest

b)

Largest to smallest

c)

Not arranged in any correct order

d)

None of the mentioned

23.

Find out the dimensionless quantity

a)

Pressure

b)

Reynolds Number

c)

Viscosity

d)

Density

24.

Which of the following is not a base unit?

a)

meter

b)

newton

c)

kilogram

d)

second

25.

Which of the following is a derived unit?

a)

metre

b)

second

c)

kilogram

d)

joule

26.

How many minutes are in a year?

a)

I can't count that high.

b)

525,600min

c)

52,560min

d)

31,536,000min

27.

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

28.

The _____________of a physical quantity is defined as the power of fundamental quantities are raised in order to represent that quantity

a)

Numerical value

b)

Dimensions

c)

Derived physical quantity

d)

Base physical quantity

29.

Dimensional formula of area is

a)

[L^2]

b)

[L^5]

c)

[L^4]

d)

[L^3]

30.

The quantities do not possess dimension formula but have a fixed value is called

a)

Dimensionless constant

b)

Dimensionless variables

c)

Dimensional constant

d)

Dimensional variable

31.

The qualities whose values are variables and they do not have dimensions is called

a)

Dimensionless constants

b)

Dimensionless variables

c)

Dimensional constant

d)

Dimensional variables

32.

Examples of dimensionless variables are

a)

relative density, angle

b)

Density ,work

c)

Force, momentum

33.

Dimensional formula of speed

a)

[M^1L^2T^0]

b)

[M^0L^2T^1]

c)

[M^0L^1T^-1]

34.

Dimensional formula of work is

a)

[M^1L^2T^1]

b)

[M^1L^2T^-2]

c)

[M^1L^2T^0]

UNITS AND DIMENSIONS

Total questions: 34

Worksheet time: 20mins

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