Physics Measurements MCQs Chapter 1 Class 11

Created on February 02, 2022 By Ali Durrani

Physics Ch 1 Class 11

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1 / 70

Electric charge on an object is measured as 5 microcoulombs. How the value of this charge can be expressed in terms of base units:

UHS 2012
Physics
Measurements
Elimination Tool:

A) 5 x 100 ampere second

B) 5 x 10-6 ampere second

C) 5 x 10+6 coulomb second

D) 5 x 100 coulomb second

2 / 70

1 light year distance is the:

PMC Practice 5
Physics
Measurements
Elimination Tool:

A) Distance traveled by earth in one year

B) Distance traveled by a star in one year

C) Distance traveled by light in one year

D) Distance travelled by light in one galactic year

3 / 70

if v is the velocity of an object, then the following equation is always:

[1-v²/c²]^-0.25

Greater than 1

) less than 1

Equal to 1

None

4 / 70

If A = 2.79 and B = 8.1 , then A+B =?

10.89

10.9

11

None

5 / 70

The length and width of a rectangular plate are measured to be 15.3 mm and 12.50 mm. Find the area of the plate up to an appropriate number of significant figures.

NUMS 2017
Physics
Measurements
Elimination Tool:

A) 191.25 mm2

B) 195.8 mm2

C) 196 mm2

D) 200 mm2

6 / 70

if 5.1 and 3.014 added. the number of significant figures will be in final answer

1

2

3

4

7 / 70

Percentage uncertainty in length and width of a rectangle is 2% and 3%. The total uncertainty in the area of that rectangle is?

UHS 2019
Physics
Measurements
Elimination Tool:

A) 1.5%

B) 5%

C) 1%

D) 6%

8 / 70

The base units of Young’s Modulus are:

NUMS 2019 Reconduct
Physics
Measurements
Elimination Tool:

A) kg m-1s-2

B) kg m-2s-2

C) kg m-3s-2

D) kg ms-3

9 / 70

A value for the acceleration of free fall on earth is given as (10+-2) m s-2. Which statement is correct?

ETEA 2017
Physics
Measurements
Elimination Tool:

A) The value is accurate but not precise

B) The value is both accurate and precise.

C) The value is neither precise nor accurate.

D) The value is precise but not accurate.

10 / 70

Which of the following is NOT a unit of energy?

PMC 2021 Tested
Physics
Work, Power & Energy
Measurements
Elimination Tool:

A) Calorie

B) None of these

C) Kilowatt

D) Joule

11 / 70

Unit of light year Is:

Seconds

Meter

Meter/Second

Volts

12 / 70

Percentage uncertainty in length and width of a rectangle is 2% and 3%. The total uncertainty in the area of that rectangle is?

UHS 2019
Physics
Measurements
Elimination Tool:

A) 1.5%

B) 5%

C) 1%

D) 6%

13 / 70

The velocity of a particle is related to time according to the equation

V= ct3. The dimensions of constant are _______.

NTS 2019
Physics
Measurements
Elimination Tool:

A) L-1 T-1

B) L T-3

C) LT -4

D) L-2 T-2

14 / 70

Least count of micrometer screw gauge is

0.02 cm

0.01 cm

0.01 mm

0.02 mm

15 / 70

The dimensional formula for change in momentum is same as that for:

ETEA 2018
Physics
Measurements
Elimination Tool:

A) Force

B) Impulse

C) Acceleration

D) Velocity

16 / 70

SI unit of velocity Is

ms

s/m

m/s

s/m2

17 / 70

The unit of temperature in base unit is:

UHS 2015
Physics
Measurements
Elimination Tool:

A) Celsius

B) Degree

C) Kelvin

D) Fahrenheit

18 / 70

SI unit of acceleration is

ms^-1

ms^-2

ms^2

ms

19 / 70

Which of the following is not a S.I. base quantity.

NUMS 2018
Physics
Measurements
Elimination Tool:

A) Mass

B) Intensity of light

C) Velocity

D) Length

20 / 70

Branch of physics which deals with sub atomic particles.

Atomic physics

Particle physics

Molecular physics

Nuclear physics

21 / 70

Which set of the prefixes gives values in increasing order?

UHS 2014
Physics
Measurements
Elimination Tool:

A) Pico, Mega, Kilo, Tera

B) Pico, Micro, Mega, Giga

C) Tera, Pico, Micro, Kilo

D) Giga, Kilo, Milli, Nano

22 / 70

Which one of the following Is correct

1GeV=10^3 eV

1Mev=10^6 eV

1eV =1.6 x 10^-19 j

All of the above

23 / 70

When the dimensions of both sides of an equation are equal, then the equation is said to be:

UHS 2011
Physics
Measurements
Elimination Tool:

A) Simultaneous

B) Homogeneous

C) Instantaneous

D) Quadratic

24 / 70

Which one of the following physical quantity does not the dimension of force per unit area

ETEA 2019
Physics
Measurements
Elimination Tool:

A) Stress

B) Strain

C) Young modulus

D) Pressure

25 / 70

Zeros are always considered significant when they are

In between non-zero digits

On left of non-zero digits

On right of non-zero digits

All of the above

26 / 70

The dimensions of acceleration are:

NTS 2011
Physics
Measurements
Elimination Tool:

A) LT-1

B) LT-2

C) L3

D) L2

27 / 70

In the SI system of units, the fundamental units of mass, time and length are ____, _____ and ______ respectively.

NUMS 2019 Reconduct
Physics
Measurements
Elimination Tool:

A) Centimeter, Centigram and Second

B) Kilometer, Kilogram and Second

C) Kilogram, Second and Meter

D) Kilogram, Second and Kilometer

28 / 70

What is 1 radian in degrees approximately

PMC Sample 3
Physics
Measurements
Elimination Tool:

A) 57.3 degrees

B) 360 degrees

C) π degrees

D) π^2 degrees

29 / 70

Weight Is equivalent to which of the following

Momentum

Energy

Acceleration

Force

30 / 70

1 rad is equal to how many degrees

57.196

57.296

58.196

58.296

31 / 70

If v = a + bt, the dimensions of a and b are

LT^-1 & LT^-2

LT^-1 & T

L^-2T & T

None

32 / 70

In SI units, the unit of Candela is used for the measurement of:

NTS 2016 DUHS & JSMU
Physics
Measurements
Elimination Tool:

A) Heat intensity

B) Light intensity

C) Energy/time

D) Energy/area

33 / 70

The unit of velocity is:

PMC Sample 2
Physics
Measurements
Elimination Tool:

A) m

B) m s

C) m / s

D) m / s^2

34 / 70

What are the units of a and b In v = a + bt, where unit of v=ms^-1 and t=s

ms^-1 and ms^-2

ms^-1 and ms^-1

ms^-2 and ms^-2

ms^-2 and ms^-1

35 / 70

Parsec(pc) is the unit of ?

Frequency

Mass

Distance

Time

36 / 70

1 femto is equal to

10 atto

100 atto

1000 atto

10000 atto

37 / 70

Volume of sphere having radius 17 cm Is:

20579.53 cm^3

0.03 cm^3

0.08 cm^3

0.01 cm^3

38 / 70

The number L = 8.0 x 104cm can be expressed as ________.

NUMS 2019 Reconduct
Physics
Measurements
Elimination Tool:

A) L = 8.0 x 106 mm

B) L = 0.8 km

C) L = 0.8 x 102 m

D) L = 8.0 x 103 m

39 / 70

Which of the following is dimensionless quantity?

NUMS 2018
Physics
Measurements
Elimination Tool:

A) Power

B) Frequency

C) Refractive Index

D) Impulse

40 / 70

Dimensions of work?

MLT^-2

ML^-1T^-2

ML^2T^2

ML^2T^-2

41 / 70

What Is absolute uncertainty In length of 10m measured by scale of precision of 0.1m?

0.1

10

0.01

1.5

42 / 70

Name the quantity which can be measured by using the base unit kgm2s-3

UHS 2013
Physics
Measurements
Elimination Tool:

A) Weight

B) Pressure

C) Power

D) Work

43 / 70

Force is a derived quantity, its derived unit can be expressed in terms of the base units as:

UHS 2018
Physics
Measurements
Elimination Tool:

A) Kgms-2

B) Kgcms-2

C) Kgm2s2

D) Kgms2

44 / 70

Suppose A =4.1, and B= 3.26 and the result from calculator comes to be 1.00876543. What should be the correct number of significant figures In final answer If multiplication and division only?

2

3

4

9

45 / 70

Which experimental technique reduces the systematic error of the quantity being investigated?

ETEA 2017
Physics
Measurements
Elimination Tool:

A) Adjusting am ammeter to remove its zero error before measuring a current.

B) Measuring several inter modal distance on a standing wave to find the mean inter modal distance

C) Measuring the diameter of a wire repeatedly and calculating the average.

D) Timing a large number of oscillation to find a period

46 / 70

In the SI system of units, the fundamental units of length, mass, and time are ____, _____ and respectively:

NTS 2019
Physics
Measurements
Elimination Tool:

A) Meter Kilogram and Kilo second

B) A kilometre, Kilogram and hour

C) Meter, Kilogram, and Second

D) Centimetre, Centigram and Second

47 / 70

The dimensions of angular velocity (ω) is:

NUMS 2019 Cancelled
Physics
Measurements
Elimination Tool:

B) MLT-1

C) MLT-2

D) M0L-2T-3

E) M0L0T-1

48 / 70

Dimensions of torsional couple Is similar to the dimension of

Power

Current

Work

Galvanometer constant

49 / 70

1 Inch = —- cm

2.50

2.52

2.54

2.56

50 / 70

Which measure Is nearest to your height?

0.01 cm

2 cm

40 cm

160 cm

51 / 70

The different magnitudes of same physical quantities are measured by comparing them to:

UHS 2018
Physics
Measurements
Elimination Tool:

A) Available scale

B) Standard size

C) Each other

D) Other physical quantities

52 / 70

Pa m² is the unit of

Work

Pressure

force

Power

53 / 70

Molar mass of water is:

PMC Sample 2
Physics
Measurements
Elimination Tool:

A) 0.018 kg/mol

B) 0.108 kg/mol

C) 0.027 kg/mol

D) 0.0635 kg/mol

54 / 70

The SI unit of mass is?

Miligram

Gram

Kilogram

Ton

55 / 70

1 femto

a) 10-15

b) 10-9

c) 10-6

d) None

a

b

c

d

56 / 70

The dimensions of momentum are the same as that of:

PMC 2021 Tested
Physics
Forces and Motion
Measurements
Elimination Tool:

A) All of these

B) Power

C) Impulse

D) Planck's constant

57 / 70

Which of the following is not a base unit in the SI system?

NTS 2016 SMBBMC
Physics
Measurements
Elimination Tool:

A) Ampere

B) Second

C) Meter per second

D) Candela

58 / 70

Identify the dimensions of area, velocity and acceleration respectively: ( where L= Length, T=Time)

NTS 2015 SMBBMC
Physics
Measurements
Elimination Tool:

A) L2T2, LT2, LT-1

B) L2, LT-1, LT-2

C) LT-1, LT-2, L2

D) LT-1,LT-1, L2

59 / 70

A quantity ? is to be determined from the equation, ? = ? – ?. ? is measured as (1.27 ± 0.02) ? and ? is measured as (0.83 ± 0.01) ?. What is the percentage uncertainty in ? to one significant figure?

ETEA 2018
Physics
Measurements
Elimination Tool:

A) 0.4%

B) 2%

C) 3%

D) 7%

60 / 70

What are the Dimensions of P^2/m, where P is the momentum and m is the mass?

M^2 L^2 T^2

M^2 L^2 T^-2

M L^2 T^-2

M LT^-2

61 / 70

Which one has least value?

femto

Pico

atto

milli

62 / 70

A metal sphere of radius r is dropped into a tank of water. As it sink at speed v, it experience a drag force F given by F= krv, where k is a constant: What are the SI base units of k?

ETEA 2017
Physics
Measurements
Elimination Tool:

A) kg m2s-1

B) kg m2s-2

C) kg m-1s-1

D) kg ms-2

63 / 70

Radian Is a:

Base unit

Derived unit

Supplementary unit

None

64 / 70

Which of the following quantity has the dimension MLT^-1

force

Work

Momentum

Pressure

65 / 70

Ratio of Nano to Atto Is:

10^9

10^8

10^12

10^-9

66 / 70

Unit of pressure?

Kelvin

Candela

Pascal

Joule

67 / 70

Which of the following is a supplementary physical quantity?

UHS 2017 Reconduct
Physics
Measurements
Elimination Tool:

A) Radian

B) Steradian

C) Both Radian & Steradian

D) None of the given options

68 / 70

Number of Significant figures in 0.001634 Is:

7

6

3

None

69 / 70

Dimension of power?

M^1L^2T^-2

M^1L^2T^-3

M^0L^-1^0

M^-1L^2T^3

70 / 70

The dimensions of volume and acceleration (respectively) are:

NTS 2010
Physics
Measurements
Elimination Tool:

A) LT-1

B) LT-2 and LT-1

C) L3 and LT-2

D) L4 T-1 and LT

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