R4RIN – MCQs, Mock Tests | ECAT ECAT Physics Measurements Mcqs Questions

Which one is not a branch of physical sciences?

1. chemistry
2. astronomy
3. geology
4. biology

✅ Correct Answer: 4

Which branch of science plays an important role in the development of technology and engineering?

1. chemistry
2. physics
3. geology
4. biology

✅ Correct Answer: 2

The number of categories in which physical quantities are divided are

1. one
2. two
3. three
4. four

✅ Correct Answer: 2

In scientific notation numbers are expressed in

1. power of ten
2. powers of two
3. reciprocal
4. decimal

✅ Correct Answer: 1

1024 can be written in scientific notation as

1. 1.024x103
2. 2 Raised to power 10
3. 0.000976
4. 1/0.00097

✅ Correct Answer: 1

How many types of units are in SI?

1. one
2. two
3. three
4. four

✅ Correct Answer: 3

The error in measurement may occur due to

1. inexperience of a person
2. the faulty apparantus
3. inappropriate method
4. due to all reasons in a b and c

✅ Correct Answer: 4

The uncertainty in a measurement may occur due to

1. limitation of an instrument
2. natural variation of the object to be measured
3. inadequate of technique
4. all given in a b and c

✅ Correct Answer: 4

Random errors can be reduced by

1. taking zero correction
2. comparing the instrument with another more accurate one
3. taking mean of several measurement
4. all methods explained in a b and c

✅ Correct Answer: 3

Preftix deca represents

1. 10 Raised to power 1
2. 10 Raised to power 2
3. 10 Raised to power 3
4. 10 Raised to power -1

✅ Correct Answer: 1

In any measurement the significant figures are

1. all accurately known and all doubtful digits
2. only accurately known digits
3. only doubtful digits
4. all accurately known digits and the first doubuful digit

✅ Correct Answer: 4

A digit zero in a measurement

1. may be significant may not significant
2. always significant
3. always insignificantsig
4. significant only if left to a significant figure

✅ Correct Answer: 1

Number of significant figures in 0.0173 are

1. three
2. four
3. five
4. two

✅ Correct Answer: 1

Smaller the least count of the instrument more is the measurement

1. accurate
2. precise
3. accurate and precise
4. none of these

✅ Correct Answer: 2

The dimension of force is

1. MLT-1
2. MLT-2
3. ML-1T
4. ML-1T-2

✅ Correct Answer: 2

ML-1 T-2 is the dimension of

1. force
2. pressure
3. momentum
4. energy

✅ Correct Answer: 2

Dimensional analysis is helpful for

1. deriving a possible formula
2. checking the homogeneity of a physical equation
3. verification of laws
4. only a and b are correct

✅ Correct Answer: 4

Which equation is not dimensionally correct?

1. E=mc2
2. Vf=Vi+at
3. S=Vt2
4. S=1/2at2

✅ Correct Answer: 3

SI unit of coefficient of viscosity is

1. Kg.m.S-1
2. Kg m-1.S-1
3. Kg.m.S
4. Kg-1.m-1.S-1

✅ Correct Answer: 2

Three students measured length of a needle with meter rod and recorded as : (i) 0.2145m (ii) 0.21m (iii) 0.214m Which one is correct record?

1. only (i)
2. only (ii)
3. only (iii)
4. both (i) and (ii)

✅ Correct Answer: 3

One light year is equal to

1. 9.5x1015m
2. 9.5x1015sec
3. 9.5x1015Km
4. 9.5x1015cm

✅ Correct Answer: 1

Absolute uncertainty in a measurement depends upon

1. magnitude of the measurement
2. least count of the instrument
3. percentage error in the measurement
4. all of a b and c

✅ Correct Answer: 2

Steradian is the SI unit of

1. plane angle
2. solid angle
3. both plane angle and solid angle
4. neither plane angle nor solid angle

✅ Correct Answer: 2

An ideal standard of measurement of a base quantity has characteristics

1. accessible
2. invariable
3. transportable
4. only a and b are correct

✅ Correct Answer: 4

Total uncertainty in result obtained from the subtraction of two measurement is equal to

1. sum of their absolute uncertainties
2. difference of their absolute uncertainties
3. verification of laws
4. division of their absolute uncertainties

✅ Correct Answer: 1

Which one is the highest power multiple?

1. giga
2. beta
3. mega
4. deca

✅ Correct Answer: 1

One pico stands for

1. 10 raised to power -15
2. 10 raised to power -12
3. 10 raised to power -9
4. 10 raised to power -6

✅ Correct Answer: 2

The unit of force is _________ and its symbol is __________. Which is the correct pair?

1. Newton n
2. Newton N
3. newton n
4. newton N

✅ Correct Answer: 4

Unit of G is?

1. Nm2Kg2
2. Nm2Kg
3. Nm2Kg-2
4. none

✅ Correct Answer: 2

How many main frontiers of fundamental science?

1. 1
2. 2
3. 3
4. 4

✅ Correct Answer: 3

Which one is the derived quantity in SI units?

1. electric current
2. electric charge
3. plane angle
4. amount of substance

✅ Correct Answer: 2

Which one is the correct representation of the unit of pressure?

1. Newton/Meter2
2. newton/meter2
3. Newton/meter2
4. newton/Meter2

✅ Correct Answer: 2

Which one is the dimensionally correct equation?

1. f=vt
2. S=Vit+1/2at2
3. V=St
4. V=f/t

✅ Correct Answer: 2

Zero error of the instrument is a type of

1. random error
2. personal error
3. systematic error
4. classified error

✅ Correct Answer: 3

In multiplication and division of measurement

1. percentage uncertainties are added
2. absolute uncertainties are added
3. percentage uncertainties are divided
4. absolute uncertainties are divided

✅ Correct Answer: 1

The number of significant figures in 5.400 are

1. three
2. five
3. two
4. none

✅ Correct Answer: 4

To reduce the uncertainty in the timing experiment

1. highly precise instrument
2. conduct at room temperature
3. count more number of vibration
4. both a and c

✅ Correct Answer: 4

The unmber of significant figures in the length of a bar 6200mm measured by meter rod are

1. four
2. three
3. two
4. none of these

✅ Correct Answer: 1

The number 76.85 is rounded off upto two significant figures as

1. 76.8
2. 77
3. 76.9
4. none of these

✅ Correct Answer: 2

Which of the following is not a correct representation method for prefixes

1. 1mm
2. 10km
3. 1000um
4. both (a) and (b)

✅ Correct Answer: 3