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RRB Science Planner Physics - Measurement and Units

Total questions: 100

Worksheet time: 50mins

Name
Class
Date
1.

Lux is the SI unit of

a)

Intensity of illumination

b)

Luminous efficiency

c)

Luminous flux

d)

Luminous intensity

2.

What is the S.I. unit of wave speed?

a)

Meter

b)

Meter/second

c)

Second

d)

Hertz

3.

A 'light year' is a unit that is used to measure:

a)

Time

b)

Distance

c)

Motion

d)

Speed

4.

1 atmosphere = ?

a)

1.01×10⁵ Pa

b)

10.1×10⁵ Pa

c)

1.01×10⁶ Pa

d)

10.1×10⁶ Pa

5.

1 horse power is equal to -

a)

764 watt

b)

768 watt

c)

764 watt

d)

785 watt

6.

What is 746 watt called?

a)

1 horsepower

b)

1 kW

c)

1 Pascal

d)

1 Joule

7.

1 Diopter is equal to –

a)

1 mm⁻¹

b)

1 m⁻¹

c)

1 dm⁻¹

d)

1 cm⁻¹

8.

What does a meter equal?

a)

10⁶ micron

b)

10⁶ micron

c)

10³ micron

d)

10³ micron

9.

Sound pollution is measured in-

a)

Decibel

b)

Joule

c)

Ampere

d)

Ohm

10.

Loudness of sound is measured in-

a)

Resonance

b)

Frequency

c)

Decibel

d)

Hertz

11.

1 kWh = ?

a)

3.6×10⁷ J

b)

3.6×10⁻⁷ J

c)

3.6×10⁶ J

d)

3.6×10⁻⁵ J

12.

1 kilowatt is equal to?

a)

100 watt

b)

1000watt

c)

10watt

d)

100watt

13.

1 KW = ?

a)

1000J s⁻¹

b)

100J s⁻¹

c)

10J s⁻¹

d)

10000J s⁻¹

14.

5.5 kWh = ?

a)

14.4 × 10³J

b)

14.4 × 10⁵J

c)

14.0 × 10⁵J

d)

19.80 × 10⁶J

15.

82. 5.6 kWh = ?

a)

20.16 × 10⁶J

b)

14.4 × 10⁶J

c)

14.4 × 10⁵J

d)

19.8 × 10⁶J

16.

Atomic radius is measured in-

a)

millimeter

b)

Centimeter

c)

Kilogram

d)

Nanometer

17.

1 Newton = ?

a)

1 kg × 1 ms⁻¹

b)

1 kg × 1 m²

c)

1 kg × 1 ms⁻¹

d)

1 kg × 1 ms²

18.

4.6 kWh = ?

a)

14.0 × 10⁵J

b)

16.56 × 10⁶J

c)

14.1 × 10⁶J

d)

14.4 × 10⁶J

19.

2 kWh = ?

a)

7.2 × 10⁵J

b)

7.2 × 10⁶J

c)

7.2 × 10³J

d)

72 × 10³J

20.

4.2 kWh = ?

a)

14.4 × 10⁵J

b)

15.12 × 10⁵J

c)

14.0 × 10⁵J

d)

14.4 × 10⁶J

21.

1 Nano meter = ?

a)

1/10⁶m

b)

1/10⁹m

c)

1/10⁸m

d)

1/10¹⁰m

22.

1 coulomb/1s = ?

a)

1 volt

b)

1 ampere

c)

1 ohm

d)

1 watt

23.

1 Pico meter = ?

a)

10⁻¹¹m

b)

10⁻¹²m

c)

10⁻¹²m

d)

10¹¹m

24.

1 Joule = ?

a)

1N × 1m

b)

1W × 1h

c)

1N × 1cm

d)

1Pa × 1m

25.

The strength of winds is measured with the help of

a)

Timometer

b)

Wind indicator

c)

Barometers

d)

Beaufort scale

26.

Korotkoff sounds are observed during measuring the-

a)

Electrical insulation

b)

Atmospheric pressure

c)

Blood pressure

d)

Speed of wind flow

27.

A particular household has consumed 100 unit of energy during 5 days. How much energy is this converted to Joule.

a)

360×10⁵J

b)

360×10⁶J

c)

3.6×10⁸J

d)

3.6×10⁷J

28.

Which of the following does NOT match?

a)

Compass – used for navigation and indicates north-south directions

b)

Cyclotron – measures small magnitude Cyclones

c)

Actinometer – measures the intensity of radiation

d)

Electroscope – detects the presence of electric charge

29.

Which instrument is used to detect the presence of electric charge on an object?

a)

Multimeter

b)

Electroscope

c)

Ammeter

d)

Ohmmeter

30.

What does a hygrometer measure?

a)

Heat

b)

Humidity

c)

Force

d)

Radiation

31.

A lie detector apparatus is also known as a:

a)

Seismograph

b)

Barograph

c)

Polarimeter

d)

Polygraph

32.

Which of the following is a lie detector machine?

a)

Telescope

b)

Photometer

c)

Polygraph

d)

Tachometer

33.

Which instrument is used to show the direction of flow of current in a circuit?

a)

Galvanometer

b)

Ammeter

c)

Rheostat

d)

Voltmeter

34.

Which of the following devices is used to measure relatively high temperature, such as are encountered in furnaces?

a)

Bolometer

b)

Pyrometer

c)

Ammeter

d)

Fluxmeter

35.

Which device is used in submarines to see things above the level of the sea?

a)

Pyrometer

b)

Episcope

c)

Periscope

d)

Odometer

36.

Which instrument is used to measure atmospheric pressure?

a)

Lactometer

b)

Barometer

c)

Thermometer

d)

Multimeter

37.

Which among the following devices is used to measure the atmospheric pressure?

a)

Tetrameter

b)

Odometer

c)

Thermometer

d)

Barometer

38.

Which device is used to see the Sun?

a)

Stroboscope

b)

Telescope

c)

Helioscope

d)

Sun meter

39.

Potentiometer basically –

a)

Is a measuring instrument

b)

Is a connective device

c)

Is a calibration equipment

d)

Is a notation tool

40.

From which device is the electric current measured?

a)

Voltmeter

b)

Ammeter

c)

Ohmmeter

d)

Wavemeter

41.

Ammeter is –

a)

Is connected in a series to the circuit

b)

Must have the following legitimate resistance

c)

Draws less power

d)

All of the above

42.

What does stalagmometer used to measure?

a)

Dynamic viscosity

b)

Surface tension

c)

Refractive index

d)

Light activity

43.

Odometer is an instrument which is used in motor vehicle for measuring-

a)

Direction

b)

Distance

c)

Smell

d)

Speed

44.

Odometer in vehicle measures –

a)

Fuel

b)

Distance

c)

Smell

d)

Speed

45.

Which instrument is used for measuring distance travelled by vehicle?

a)

Accelerometer

b)

Odometer

c)

Speedometer

d)

Tachometer

46.

Which of the following speed of flow measuring instrument is area meter?

a)

Venturimeter

b)

Rotameter

c)

Pitot tube

d)

None of these

47.

Tachometer is used for-

a)

R.P.M.

b)

Torque

c)

Rotational kinetic energy

d)

Distance

48.

Multimeter consist of-

a)

Current and Ohm meter

b)

Voltmeter & Ohm meter

c)

Voltmeter & Current

d)

Voltmeter, Currentmeter & Ohm meter

49.

What is false about Richter scale?

a)

It was developed by Charles Richter and Gutenberg in 1935.

b)

It is a logarithmic scale

c)

It can be measured using seismometer

d)

A magnitude of 8-9 on the Richter scale means a light earthquake.

50.

Instrument used for measuring density of liquid is-

a)

Hygrometer

b)

Hydrometer

c)

Hypsometer

d)

Fathometer

51.

Which instrument is used for discovering the things in water?

a)

Laser

b)

Radar

c)

Sonar

d)

Scuba

52.

Echolocation in ships is used for measuring-

a)

Depth of light

b)

Density of fish

c)

Depth of water

d)

Density of oceanic vegetation

53.

............. is type of Echolocation-

a)

Vibration

b)

Frequency

c)

Radar

d)

Sonar

54.

Which instrument is used for measuring density of milk?

a)

Hydrometer

b)

Lactometer

c)

Barometer

d)

Thermometer

55.

Voltmeter is used for measuring-

a)

Air resistance

b)

Voltage

c)

Magnetic flux

d)

Electric current

56.

Which instrument is used for measuring voltage?

a)

Ammeter

b)

Potentiometer

c)

Galvanometer

d)

Voltmeter

57.

Galvanometer is used for measuring-

a)

Direction of speed

b)

Direction of magnetic flux

c)

Direction of sound

d)

Direction of current

58.

Which of the following is used to detect current in a circuit?

a)

Barometer

b)

Anemometer

c)

Lactometer

d)

Galvanometer

59.

Which is used for measuring speed of motor-

a)

Speedometer

b)

Voltmeter

c)

Velometer

d)

Lactometer

60.

Ammeter measures electric current, what does an Ohmmeter measure?

a)

Voltage

b)

Pressure

c)

Resistance

d)

Speed

61.

Which instrument is used for measuring power and speed of wind?

a)

Lactometer

b)

Speedometer

c)

Thermometer

d)

Anemometer

62.

Which of the following can be measured temperature without touching to object?

a)

Infrared thermometer

b)

Filled system thermometer

c)

Mercury glass thermometer

d)

Electric thermometer

63.

Which of the following is a scalar quantity?

a)

Pressure

b)

Displacement

c)

Force

d)

Momentum

64.

Which of the following is not a vector quantity?

a)

Speed / Impulse

b)

Force of gravity

c)

Electric current

d)

Displacement

65.

A vector quantity has both magnitude and direction, whereas a scalar quantity has only magnitude and no direction. Which of the following is a vector quantity?

a)

Work

b)

Speed

c)

Displacement

d)

Energy

66.

What is an example of vector quantity?

a)

Weight

b)

Temperature

c)

Velocity

d)

Length

67.

Which of the following is a vector quantity?

a)

Time

b)

Temperature

c)

Distance

d)

Velocity

68.

Which of the following has both direction and magnitude?

a)

Mass

b)

Distance

c)

Momentum

d)

Speed

69.

In the given physical quantities which is not a relative quantity?

a)

Time

b)

Acceleration

c)

Velocity

d)

Distance

70.

Which of the following is vector quantity?

a)

Volume

b)

Mass

c)

Force

d)

Length

71.

Which of the given below is NOT a vector quantity?

a)

Power

b)

Torque

c)

Displacement

d)

Acceleration

72.

Which of the following is a scalar quantity?

a)

Momentum

b)

Force

c)

Mass

d)

Velocity

73.

Which of the following only gives magnitude and not direction?

a)

Momentum

b)

Displacement

c)

Work

d)

Force

74.

In work – (a) There is no direction, only have magnitude (b) There are no direction & magnitude (c) Both magnitude and direction is present (d) Only direction, no magnitude Work is a scalar quantity because it is the dot product of two vectors (Force and Displacement). Work (W) = F.d Scalar quantity Vector Vector Thus, dot product of two vectors becomes scalar quantity. So, work done has only magnitude but not direction.

a)

There is no direction, only have magnitude

b)

There are no direction & magnitude

c)

Both magnitude and direction is present

d)

Only direction, no magnitude

75.

Which of the following has magnitude and no direction?

a)

Work

b)

Impulse

c)

Displacement

d)

Force

76.

Which of the following can do more work?

a)

A raised hammer

b)

A bullet fired by the gun

c)

A moving stone

d)

A rotating wheel

77.

A force of 20 N displaces an object through 2 m and does a work of 20 J. The angle between the force and displacement is:

a)

60°

b)

30°

c)

90°

d)

78.

A porter raises a 12 kg object from the surface of the earth and puts the object 1.5 meters above the surface on his head. Calculate the work done on the object (g = 10 m/s²).

a)

140 J

b)

150 J

c)

180 J

d)

150 J

79.

If an aeroplane travelled 4000m distance and work done is 20000J. Then force applied on it is

a)

5 N

b)

50 N

c)

0.20 N

d)

10 N

80.

The gravitational potential energy of an object at a point above the ground. Is defined as the work done in........

a)

Lifting it from the ground to the point above gravity

b)

Applying gravitational force on it

c)

Keep it at the center

d)

Placing it on the ground opposite to gravity

81.

The work done, to increase speed 5 m/s to 10 m/s by a car of 800kg is........

a)

30kJ

b)

40kJ

c)

20kJ

d)

10kJ

82.

An object of 1kg is dropped to the ground from a height of 30m. What is the work done by the force of gravity? (g = 10 m/s²)

a)

10J

b)

300J

c)

0.33J

d)

30J

83.

A person picks up 20kg of goods at 2m above the ground and keeps it on his head, work done by the person is?

a)

200J

b)

400J

c)

40J

d)

20J

84.

An object of 1 kg, raised 10m above the surface of earth then work done by gravitational force will- (g = 9.8 m/s²)

a)

98J

b)

-9.8J

c)

9.8J

d)

-98J

85.

A man raised 20kg object from the surface of earth and put the object 2m above on his head. Calculate the work done by the man is- (g = 10 m/s²)

a)

350J

b)

200J

c)

400J

d)

150J

86.

When an object move 1m distance by 1N force on the direction of force then work done will-

a)

10J

b)

100J

c)

0.01J

d)

1J

87.

Work done by man standing on a platform holding 10kg suitcase is-

a)

100J

b)

0J

c)

98J

d)

980J

88.

A 4.0 kg object is moving horizontally with a speed of 5.0 m/s. To increase its speed to 10 m/s, the amount of net work required to be done on this object is:

a)

150J

b)

100J

c)

75J

d)

50J

89.

A ball weighing 0.1 kilogram is dropped from a stationary position when it falls from a distance of 2 meters, then what will be the work done by the force of gravity.

a)

1.96 J

b)

-1.96 J

c)

-0.98 J

d)

0.98 J

90.

When the force exerted on an object, then the work done will be zero if it has displacement.

a)

Negative

b)

Positive

c)

Neutral

d)

Zero

91.

A boy raises a box with a weight of 120 N through a height of 2 m. The work done by the boy is-

a)

60 J

b)

180 J

c)

240 J

d)

120 J

92.

Capacity of doing work is known as-

a)

Power

b)

Pressure

c)

Energy

d)

Force

93.

If the value of work is positive then the kinetic energy of the body -

a)

Decrease his energy

b)

Its value will be zero

c)

It will stay

d)

Increase his energy

94.

Which of the following position is no work done?

a)

Kapil stands with a weight of 10 kg on his shoulder

b)

Sachin walks 4 km

c)

A porter carries weight from a bus to a car.

d)

Arun plays cricket on the field.

95.

The work done by the force is positive when-

a)

Displacement occurs in the direction of force

b)

Displacement is perpendicular to the force

c)

There is no displacement due to the force

d)

Displacement occurs in opposite direction of force

96.

Which of the following activities can be said to have work done?

a)

Harsh is reading the book

b)

Pinky is walking on a flat road with a book on her head

c)

Shruti is sitting on the chair

d)

Khusi is pushing the wall of the house, but fails to do it.

97.

A porter lifts 500 N up to a distance of 100 meters work done by the porter is-

a)

50N

b)

0.20N

c)

0N

d)

5N

98.

In which of the following work is not done?

a)

A wind mill raising the water from well

b)

A donkey put a weight on his back

c)

Suman is swimming in a pool

d)

A engine is pulling a train

99.

Efficiency of work is known as-

a)

Energy

b)

Velocity

c)

Force

d)

Speed

100.

If the work done is zero, then the angle between force and displacement is-

a)

b)

90°

c)

45°

d)

30°