Free Printable Unit#1 Measurement

1.

Minimum requirement to represent a physical quantity?

a)

Only magnitude

b)

Magnitude and Unit

c)

Magnitude, unit & direction

d)

Magnitude, unit & direction

2.

Pick the odd one out.

a)

Dose

b)

Equivalent dose

c)

RBE factor

d)

Energy

3.

Characteristics of standard are

a)

Invariable or accessible

b)

Variable and accessible

c)

Invariable and accessible

d)

Variable or accessible

4.

Physical quantity which has only magnitude

a)

Scalar

b)

Vector

c)

Tensor

d)

Ratio

5.

Which of the following is not a supplementary quantity?

a)

radian

b)

steradian

c)

degree

d)

all of these

6.

How many radians are equal to 1 degree?

a)

57.3

b)

$\frac{180}{\pi}$

c)

0.0174

d)

0.00174

7.

Angle subtended at the center of circle when a body moves from one point to another is called

a)

plane angle

b)

solid angle

c)

radian

d)

steradian

8.

_____ is the only SI unit with prefix as part of its name and symbol.

a)

angstrom

b)

micron

c)

fermi

d)

kilogram

9.

An observer note reading of scale from different angles while measuring the length of the wire, what type of error is possible?

a)

Systematic error

b)

Random error

c)

Zero error

d)

Precised error

10.

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

a)

available scale

b)

other physical quantities

c)

each other

d)

standard size

11.

SI unit of energy density is same as that of

a)

inductance

b)

surface tension

c)

coefficient of viscosity

d)

modulus of elasticity

12.

1 Mega Ohm = ______ Giga Ohm

a)

$10^{-3}$

b)

$10^{-6}$

c)

$10^3$

d)

$10^6$

13.

0.001 pF = _____ $\mu$ F

a)

$10^9$

b)

$10^{-9}$

c)

$10^6$

d)

$10^{-6}$

14.

$\ f=\frac{1}{2l}\sqrt{\frac{F}{m}}$ In this expression to find the value of percentage uncertainty in "F", the formula is

a)

2(%age uncertainty in l)+2(%age uncertainty in f)+%age uncertainty in m

b)

%age uncertainty in l+2(%age uncertainty in f+%age uncertainty in m

c)

%age uncertainty in l+%age uncertainty in f)+(%age uncertainty in m)

d)

2(%age uncertainty in l)+2(%age uncertainty in f)+2(%age uncertainty in m)

15.

Units of $\rho:\eta$ are

a)

$sm^{-1}$

b)

$s^{-1}m$

c)

$sm^{-2}$

d)

$s^{-1}m^{-1}$

16.

An ammeter has a range of 0.6 A while it has 30 divisions. Absolute uncertainty of the device is

a)

0.02 A

b)

0.01 A

c)

0.03 A

d)

0.06 A

17.

Value of potential difference is measured as 10.0 V by a voltmeter having least count of 0.1 V, then fractional uncertainty is

a)

0.1

b)

0.01

c)

0.001

d)

1

18.

Time for ten vibrations of a simple pendulum is taken as 20.5 s by a stop watch of least count 0.1 s. Then absolute uncertainty in time period is

a)

0.0001

b)

0.001

c)

0.01

d)

0.1

19.

Density of a substance is 1 g $cm^{-3}$ , its value is equivalent to ______ kg $m^{-3}$

a)

$10$

b)

$10^3$

c)

$10^{-3}$

d)

$10^{-1}$

20.

In an electrical experiment voltage and current are measured as V=100 $\pm$ 5 V and I=10 $\pm$ 0.2 A, value of resistance is

a)

10 $\Omega\pm$ 70%

b)

10 $\Omega\pm$ 7%

c)

10 $\Omega\pm$ 35%

d)

10 $\Omega\pm$ 14%

21.

Diameter of a wire is taken as 1.20, 1.22 and 1.23 in mm by micrometer, total uncertainty in the average value is

a)

1.0

b)

0.01

c)

0.001

d)

10.0

22.

Name the quantity which can be measured by using base unit $kgm^2s^{-1}$

a)

stress

b)

viscosity

c)

electromotive force

d)

angular momentum

23.

Which one is the highest power multiple?

a)

Giga

b)

Tera

c)

Mega

d)

Deca

24.

Van der waal equation for of real gas is (P+ $\frac{a}{V^2}$ )(V-b)=nRT, SI base unit of "b" are

a)

$Pa\ m^{-3}$

b)

$Pa^{-1}m^3$

c)

$Pa^0\ m^3$

d)

$m^{-3}$

25.

$F=\frac{X}{\sqrt{\rho}}$ , SI unit of "X" are

a)

pascal

b)

joule

c)

watt

d)

coulomb

26.

Which of the following is not the unit of electrical conductivity?

a)

simon

b)

mho

c)

\Omega^{-1}

d)

$AV^{-1}$

27.

Which of the following pairs of units are both SI base units?

a)

ampere, degree celsius

b)

candela, coulomb

c)

ampere, kelvin

d)

second, biot

28.

SI base unit of gravitational constant is

a)

$kg^{-1}m^3s^{-2}$

b)

$kg^{-1}m^3s^2$

c)

$kg^{ }m^{-3}s^{-2}$

d)

$kg^{-1}m^{-3}s^2$

29.

SI unit of Boltzman's constant is same as that of

a)

Molar specific heat

b)

Specific heat

c)

Latent heat

d)

Entropy

30.

Smallest unit of energy is ______

a)

calorie

b)

Btu

c)

joule

d)

electron volt

31.

SI base unit of $\frac{L}{R}$ will be

a)

$ms^{-1}$

b)

$m^{-1}s$

c)

$s$

d)

m

32.

The least count of an instrument is 0.01 cm. Taking all precautions, the maximum possible error in the measurement can be

a)

0.02 cm

b)

0.005 cm

c)

0.001 cm

d)

0.01 cm

33.

Which of the following is most precise instrument?

a)

meter rod

b)

screw gauge

c)

vernier caliper

d)

all of these

34.

If percentage errors in moment of inertia and angular acceleration are 2% and 3% respectively, then %age error in the moment of force is

a)

5%

b)

6%

c)

7%

d)

8%

35.

SI unit of solar constant is

a)

$J\ m^{-2}$

b)

$W\ m^{-2}$

c)

$W\ s^{-1}$

d)

$W\ m^{-2}$

36.

Out of the following which have same power in base units of viscosity and spring constant?

a)

meter

b)

second

c)

kilogram

d)

meter and second

37.

If $x=a^n$

, then fractional uncertainty in "x" is

a)

$\pm\left(\frac{\Delta a}{a}\right)^n$

b)

$\pm n\left(\frac{\Delta a}{a}\right)^{ }$

c)

$\pm\left(\frac{\Delta a}{a}\right)^{ }$

d)

none of these

38.

If %age uncertainty in mass and momentum is 1% and 2% respectively, then find the total uncertainty in K.E

a)

3%

b)

4%

c)

5%

d)

6%

39.

In SI, number of physical quantities are?

a)

7

b)

2

c)

3

d)

infinite

40.

Which of the following has units?

a)

specific gravity

b)

relative velocity

c)

permeability of medium

d)

none of these

41.

$m^{-1}$ is the SI unit of?

a)

Wave number

b)

Rydberg's constant

c)

Power of lens

d)

all of these

42.

SI unit of specific charge is _____

a)

C

b)

C\ kg^{-1}

c)

C kg

d)

no units

43.

watt-day is the unit of

a)

power

b)

momentum

c)

energy

d)

angular momentum

44.

Timing uncertainty can be reduced by

a)

using stop watch of large least count

b)

measuring time period for greater number of vibrations

c)

using long string in simple pendulum

d)

by increasing the amplitude of vibration

45.

__________ of a measurement is the extent to which systematic error make a measured value differ from its true value.

a)

Accuracy

b)

Precision

c)

Uncertainty

d)

all of these

46.

Errors due to fluctuations in the quantity being measured are called

a)

Personal error

b)

Random error

c)

Systematic error

d)

Parallax error

Unit#1 Measurement

Total questions: 46

Worksheet time: 23mins

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