TNPSC SCIENCE ONLINE TEST IN ENGLISH – 01

By KARKANDU KANITHAM

Published on: December 24, 2024

TNPSC SCIENCE ONLINE TEST IN ENGLISH – 01: VIII STD LESSON-1: MEASUREMENT

TNPSC SCIENCE

TNPSC SCIENCE ONLINE TEST IN ENGLISH - 01

1 / 50

1) The unit of mass in the FPS system is _____.

A) g

B) kg

C) kgWt

D) pound

2 / 50

2) Faraday is a unit of _____.

A) time

B) length

C) charge

D) capacitance

3 / 50

The National Physical Laboratory of India is located in _____.

A) Goa

B) Chennai

C) Lucknow

D) New Delhi

4 / 50

N/m^(2) is more commonly known as _____.

A) Watt

B) Joule

C) Kelvin

D) Pascal

5 / 50

A system of units is _____.

A) arbitrary

B) fictitious

C) purely a convention

D) a method of assigning units to physical quantities

6 / 50

The SI unit system is based on the _____.

A) CGS system

B) MKS system

C) FPS system

D) (None of the above)

7 / 50

1 km/s is the same as _____.

A) 1 m/s

B) 1 foot/s

C) 10^(3) m/s

D) (5/18) m/s

8 / 50

25 Megajoules can also be expressed as _____ .

A) 25000 J

B) 250000 J

C) 2500000 J

D) 25000000 J

9 / 50

The convenient unit for measuring energy in atomic physics is _____ .

A) Erg

B) Joule

C) Calorie

D) Electron Volt

10 / 50

In the SI unit system, the units of the fundamental quantities are defined in terms of _____ defining constants.

A) 3

B) 4

C) 7

D) 9

11 / 50

In the SI unit system, the units of derived quantities are expressed in terms of units of _____.

A) any physical quantity

B) only fundamental quantities

C) mass, length and time only

D) fundamental and complementary quantities

12 / 50

The time rate of change of velocity will have the unit of _____.

A) m/s

B) m/s^(2)

C) m/s^(3)

D) (not a meaningful quantity)

13 / 50

When a physical concept is expressed mathematically, then it is called a _____.

A) unit

B) value

C) physical quantity

D) mathematical equation

14 / 50

If the value of acceleration due to gravity is 9.8 m/s^2, then its value in the CGS system will be _____.

A) 10 m/s^(2)

B) 980 cm/s^(2)

C) 32 ft/s^(2)

D) 9.8 cm/s^(2)

15 / 50

Which of the following quantities has/have no unit? A: Plane angle B: Refractive index C: Relative density

A) Only A

B) Only C

C) Only B and C

D) All - A, B and C

16 / 50

1 slice of cake weighs 50 g. What will be the weight of 5 such slices of cake?

A) 250 kg

B) 10 kg

C) 0.25 kg

D) 0.05 kg

17 / 50

It is given that Q = (Force × Volume)/(Area). Which of the following is a correct unit for Q?

(i) Nm

(ii) Joule

(iii) kg m^(2) s^(–2)

A) Only (i)

B) Only (iii)

C) Only (ii) and (iii)

D) All - (i), (ii) and (iii)

18 / 50

A car travels at a speed of 30 kilometres per hour. How many meters does it travel in 10 minutes?

A) 500 m

B) 1000 m

C) 2500 m

D) 5000 m

19 / 50

A second is 1/60 of a minute, which is 1/60 of an hour, which is 1/24 of a day. Hence, a second is _____ of a day.

A) 86400

B) 144

C) 1/144

D) 1/86400

20 / 50

Q = {frequency × Planck's constant}/(speed of light)^(2) If the units of frequency, Planck's constant and speed of light are Hertz, J s and m/s respectively, then, Q has the unit of _____.

A) mass

B) length

C) energy

D) momentum

21 / 50

Is a measurement with no error possible? Justify.

A) Yes, since technology has evolved to the point that we can achieve 100% accuracy in measurements.

B) Yes, since humans have completely moved away from analogue devices to digital devices that give precise readings.

C) No, since there is inherent uncertainty in the quantity being measured owing to factors like the least count of the measuring instrument.

D) No, since there are limits to exponents when measuring large quantities (yotta => 10^(24)) and small quantities (yocto => 10^(-24)).

22 / 50

Predict the key outcome that would logically follow from every country following their own systems of measurement.

A) Every country would get to retain their cultural identity and fight globalisation.

B) Scientists would find it difficult to collaborate and share research findings.

C) A diversity in units would enrich the knowledge bank and benefit scientists around the world.

D) Human error would be completely eliminated since each community would use units that they are 100% confident about.

23 / 50

Which of the following have the same units? (a) (force/mass) (b) (pressure × area) / (mass) (c) (momentum) / (time × mass)

A) Only (a) and (b)

B) Only (a) and (c)

C) Only (b) and (c)

D) All - (a), (b) and (c)

24 / 50

The SI unit of electric current is _____.

A) Kelvin

B) Ampere

C) Coulomb

D) Candela

25 / 50

The magnitude of electric current is the amount of electric charges flowing through a conductor _____.

A) per unit time

B) per unit length

C) per unit kilogram

D) per unit temperature

26 / 50

Temperature is defined as a measure of the average _____ energy of the particles in a system.

A) kinetic

B) nuclear

C) potential

D) chemical

27 / 50

Celsius, Kelvin and _____ are the most commonly used scales to measure temperature.

A) Faraday

B) Ampere

C) Fahrenheit

D) Candela

28 / 50

When the SI unit system was developed, scientists chose _____ physical quantities as 'base quantities'.

A) 5

B) 6

C) 7

D) 8

29 / 50

29._____ is a device used to measure electric current.

A) Ammeter

B) Voltmeter

C) Chargemeter

D) Amperemeter

30 / 50

Study the two statements given below. Statement A: The CGS, MKS and SI unit systems are metric system of units. Statement B: The FPS system is not a metric system. Which statement(s) is/are true?

A) Only (A)

B) Only (B)

C) Both (A) and (B)

D) Neither (A) nor (B)

31 / 50

Upon heating a kettle of water with an open top, we observe that the overall amount of water in the kettle decreases. What is the reason for this?

A) Some of the water has leaked from the kettle.

B) Water only appears to decrease but this does not actually happen.

C) Some of the water has turned into water vapour and is lost to the surroundings.

D) The kettle expands on heating and absorbs water which reduces the overall amount of water in it.

32 / 50

If 5 Coulomb of charge flows through a circuit for 20 seconds, the current flowing through the circuit is _____ A.

A) 0.2

B) 0.25

C) 4

D) 100

33 / 50

What happens when heat is supplied to a substance? (A) The temperature of the substance always increases. (B) The substance always changes its state.

A) Only (A)

B) Only (B)

C) Both (A) and (B)

D) Neither (A) nor (B)

34 / 50

What is true about the assertion/reason pair given below? Assertion (A): Higher the amount of electric charge flowing through a conductor in a fixed given time, higher will be the magnitude of electric current. Reason (R): Using the formula, Q = I/t, we see that current I is directly proportional to the amount of electric charge Q.

A) Both (A) and (R) are correct and (R) is the correct explanation of (A).

B) Both (A) and (R) are correct but (R) is not the correct explanation of (A).

C) (A) is true but (R) is false.

D) (A) is false but (R) is true.

35 / 50

Why are thermometers calibrated with different scales like Celsius and Kelvin?

A) To help scientists get two different sets of readings for better accuracy

B) Scientists from different countries believe in certain scales being better than others.

C) Different scales serve different purposes and end goals.

D) It depends on the thermometric fluid available.

36 / 50

In December, 1998, the National Aeronautics and Space Administration (NASA), launched the Mars Climate Orbiter to collect data about the Martian climate. Nine months later, on September 23, 1999, the Orbiter disappeared while approaching Mars at an unexpectedly low altitude. What was the possible reason for this occurrence?

A) The scientists working on this project took a tea break and failed to monitor the track of the Mars Climate Orbiter.

B) Different teams working on the project used different systems of units and this led to a miscommunication regarding the Mars Climate Orbiter.

C) The scientists tasked with monitoring the Mars Climate Orbiter on the day took a leave of absence without informing their supervisor.

D) Different teams working on this project were also working on other projects and unable to prioritise and plan their time effectively.

37 / 50

If the acceleration due to gravity is 10 m/(s^2) and the units of length and time are changed to kilometre and hour respectively, then the numerical value of acceleration will become _____.

A) 36

B) 864

C) 129600

D) 74649600

38 / 50

It is given that x = at + bt^(2), where x is distance travelled by a body in metres while t is the time in seconds. Then, the units of a are _____.

A) m/s

B) m s

C) m/(s^2)

D) m (s^2)

39 / 50

It is given that x = at + bt^(2), where x is distance travelled by a body in metres while t is the time in seconds. Then, the units of b are _____.

A) m/s

B) m s

C) m/(s^2)

D) m (s^2)

40 / 50

The instrument used for measuring the intensity of visible light is called a/an _____.

A) photometer

B) optometer

C) spectrometer

D) spectroscope

41 / 50

The colour of light that the human eye is most sensitive to is _____.

A) red

B) violet

C) blue

D) yellow

42 / 50

The light emitted from a common wax candle is approximately _____.

A) 1 candela

B) 1 lumen

C) 1 mole

D) 1 dioptre

43 / 50

Cd is the symbol for _____.

A) lumen

B) candela

C) luminous power

D) carbon dioxide

44 / 50

The unit of luminous flux is _____.

A) watt

B) mole

C) lumen

D) candela

45 / 50

Light is emitted from _____.

A) a non-luminous body

B) a self-luminous body

C) any solid object

D) any liquid

46 / 50

The term 'light', includes the _____ region of the electromagnetic energy spectrum.

A) ultraviolet

B) infrared

C) visible

D) radio

47 / 50

One mole of oxygen gas and one mole of nitrogen gas will have an equal number of _____.

A) protons

B) neutrons

C) electrons

D) molecules

48 / 50

Which of the following is the odd one out based on the type of physical quantity that it represents?

A) time

B) speed

C) force

D) pressure

49 / 50

The number of atoms present in 52 g of helium is _____ NA. (Note: NA is Avogadro's constant and the atomic mass of helium is 4 g.)

A) NA

B) 13NA

C) 26NA

D) 52NA

50 / 50

The volume of one mole of any gas at STP (standard temperature and pressure) is 22.4 litre. What will be volume of 8 g of helium at STP?

A) 11.2 litre

B) 22.4 litre

C) 44.8 litre

D) (the data is insufficient)

Your score is

Pos.	Name	Score	Duration
1	DEVI	2 %	37 seconds

ONLINE TEST

TNPSC SCIENCE ONLINE TEST IN ENGLISH – 01

TNPSC SCIENCE ONLINE TEST IN ENGLISH – 01: VIII STD LESSON-1: MEASUREMENT

KARKANDU KANITHAM

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