1024 can be written in scientific notation as

1.1.024x103

2.2 Raised to power 10

3.0.000976

4.1/0.00097

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

A field in which the work done in a moving a body along closed path is zero is called

1.electric field

2.conservative field

3.electromagnetic field

4.gravitational field

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

An elevator weighing 3.5 x 10-6 N is raised to a height of 1000 m in the absence of friction, the work done is

1.3.5 x 103 J

2.3.5 x 104 J

3.3.5 x 106 J

4.3.5 x 109 J

An ideal standard of measurement of a base quantity has characteristics

1.accessible

2.invariable

3.transportable

4.only a and b are correct

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

How many main frontiers of fundamental science?

1.1

2.2

3.3

4.4

How many types of units are in SI?

1.one

2.two

3.three

4.four

If a body a mass of 2 kg is raised vertically through 2m, then the work done will be

1.38.2 J

2.392.1 J

3.39.2 J

4.3.92 J

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

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

In scientific notation numbers are expressed in

1.power of ten

2.powers of two

3.reciprocal

4.decimal

ML-1 T-2 is the dimension of

1.force

2.pressure

3.momentum

4.energy

Number of significant figures in 0.0173 are

1.three

2.four

3.five

4.two

One light year is equal to

1.9.5x1015m

2.9.5x1015sec

3.9.5x1015Km

4.9.5x1015cm

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

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

Proton electron neutron and a particles have same momentum. Which of them have highest K.E?

1.Proton

2.electron

3.neutron

4.a-particle

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

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

Slope of work time graph is equal to

1.displacement

2.acceleration

3.power

4.energy

Smaller the least count of the instrument more is the measurement

1.accurate

2.precise

3.accurate and precise

4.none of these

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

The average power and instantaneous power become equal if work is done at

1.any rate

2.at variable rate

3.at uniform rate

4.at high rate

The dimension of force is

1.MLT-1

2.MLT-2

3.ML-1T

4.ML-1T-2

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

The number 76.85 is rounded off upto two significant figures as

1.76.8

2.77

3.76.9

4.none of these

The number of categories in which physical quantities are divided are

1.one

2.two

3.three

4.four

The number of significant figures in 5.400 are

1.three

2.five

3.two

4.none

The relation between horse power and watt is

1.1 hp = 546 watts

2.1 hp = 746 watts

3.1 hp = 1000 watts

4.1 hp = 946 watts

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

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

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

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)

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

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.product of their absolute uncertainties

4.division of their absolute uncertainties

Unit of G is?

1.Nm2Kg2

2.Nm2Kg

3.Nm2Kg-2

4.none

When a force is parallel to the direction of motion of the body, then work done on the body is

1.zero

2.minimum

3.infinity

4.maximum

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

1.chemistry

2.physics

3.geology

4.biology

Which equation is not dimensionally correct?

1.E=mc2

2.Vf=Vi+at

3.S=Vt2

4.S=1/2at2

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

1.1mm

2.10km

3.1000um

4.both (a) and (b)

Which of the following types of force can do no work on the particle on which it acts?

1.frictional force

2.gravitational force

3.elastic force

4.centripetal force

Which one is not a branch of physical sciences?

1.chemistry

2.astronomy

3.geology

4.biology

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

1.Newton/Meter2

2.newton/meter2

3.Newton/meter2

4.newton/Meter2

Which one is the derived quantity in SI units?

1.electric current

2.electric charge

3.plane angle

4.amount of substance

Which one is the dimensionally correct equation?

1.f=vt

2.S=Vit+1/2at2

3.V=St

4.V=f/t

Which one is the highest power multiple?

1.giga

2.beta

3.mega

4.deca

Work done will be maximum if the angle between the force F and displacement d is

1.45?

2.90?

3.180?

4.0?

Zero error of the instrument is a type of

1.random error

2.personal error

3.systematic error

4.classified error

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