Units and Measurements Test

Result

Units and Measurements Test - 1

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

In International System of units, there are seven base quantities whose units are defined. Which physical quantity has a prefix with its unit?

A
Mass

B
Thermodynamic temperature

C
Luminous intensity

D
Amount of substanc

Solution

The SI unit of mass is kilogram in which 'kilo' is the prefix.
Question 2
4 / -1

The wrong unit conversion among the following is

A
1 angstrom = 10^-10 m

B
1 fermi = 10^-15 m

C
1 light year = 9.46 x 10¹⁵ m

D
1 astronomical unit = 1.496 x 10^-11 m

Solution

I astronomical unit = 1.496 x 10¹¹ m
All the other unit conversation are correct.
Question 3
4 / -1

Which of the following physical quantities has same unit in all the three system of units?

A
Mass

B
Length

C
Time

D
None of these

Solution

Unit of time (i.e., second) is same in all the three system of units.
Question 4
4 / -1

Which of the following is not the name of a physical quantity?

A
Time

B
Impulse

C
Mass

D
Kilogram

Solution

The kilogram represents the unit of physical quantity and not the physical quantity.
Question 5
4 / -1

Which one of the following physical quantities is not a fundamental quantity?

A
Luminous intensity

B
Thermodynamic temperature

C
Electric current

D
Work

Solution

Among the given physical quantities work is not a fundamental quantity whereas all other three physical quantities are fundamental quantities.
Question 6
4 / -1

Which one of the following statements is incorrect?

A
Direct and indirect methods are used for the measurement of physical quantities.

B
Scientific notation and the prefixes are used to simplify numerical computation.

C
A dimensionally correct equation need not be a correct equation.

D
The SI units is based on six base units.

Solution

The SI units is based on seven base units. These are metre, kilogram second, ampere, kelvin mole and candela.
Question 7
4 / -1

Which one of the following is not a unit of British system of units?

A
Foot

B
Metre

C
Pound

D
Second

Solution

Among the given units metre is not a unit of British system whereas all other belong to this system.
Question 8
4 / -1

Which of the following is not a unit of time?

A
Parse

B
Year

C
Second

D
Hour

Solution

Parsec is the unit of distance.
1 parsec = 3.08 x 10¹⁶ m
Parsec is the distance at which average radius of earth's orbit subtends an angle of 1 arc second.
Question 9
4 / -1

Which one of the following is not a derived unit?

A
joule

B
watt

C
kilogram

D
newton

Solution

Among the given units kilogram is the fundamental or base unit whereas others are the derived units.
Question 10
4 / -1

Which of the following units is not a base unit?

A
metre

B
candela

C
ampere

D
pascal

Solution

Among the given units pascal is the derived unit whereas other are the fundamental or base units.
Question 11
4 / -1

Which of the following system of units is not based on unit of mass, length and time?

A
CGS

B
FPS

C
MKS

D
SI

Solution

SI is not based on units of mass, length and time alone.
Question 12
4 / -1

In which year SI system of units was developed and recommended by General Conference on Weights and Measures?

A
1951

B
1961

C
1971

D
1981

Solution

The SI system of units was developed and recommended by General Conference on Weights and Measures in 1971.
Question 13
4 / -1

Spot out the odd one.

A
calorie

B
kilowatt hour

C
joule

D
watt

Solution

Calorie, kilowatt hour, joule all are the units of energy whereas watt is the unit of power.
Question 14
4 / -1

Which of the following is unitless quantity?

A
Pressure gradient

B
Displacement gradient

C
Force gardient

D
Velocity gradient

Solution

Among the given quantities displacement gradient is a unitless quantity.
Question 15
4 / -1

Match the Column I with Column II.

A
A - s, B - r, C - p, D - q

B
A - p, B - q, C - r, D - s

C
A - q, B - p, C - s, D - r

D
A - r, B - s, C - p, D - q

Solution
Question 16
4 / -1

The SI unit of pressure gradient is

A
N m^-2

B
N m

C
N m^-1

D
N m^-3

Solution

Pressure gradient = Pressure/Distance
∵ The SI unit of pressure is N m^-2 and distance is m.
∴ The SI unit of pressure gradient is N m^-3.
Question 17
4 / -1

The relative density of lead is 11.3. Its density in SI unit is

A
1.13 × 10³

B
1.13 × 10²

C
1.13 × 10⁴

D
11.3

Solution

∴ Density of lead = 11.3 × 1 × 10³ kg m⁻³
(∵ Density of water = 1 × 10³kg m⁻³)
= 11.3 × 10³ kg m⁻³ = 1.13 × 10⁴ kg m⁻³
Question 18
4 / -1

The value of universal gravitational constant G = 6.67 × 10⁻¹¹N m² kg⁻². The value of G in units of g⁻¹cm³ s⁻² is

A
6.67 × 10⁻⁸

B
6.67 × 10⁻⁷

C
6.67 × 10⁻⁹

D
6.67 × 10⁻¹⁰

Solution

G = 6.67 × 10⁻¹¹ N m²kg⁻²
= 6.67 × 10⁻¹¹× (kg m s⁻²)(m²)(kg)⁻²
= 6.67 × 10⁻¹¹× [(1000 g) × (100 cm) × s⁻²] × (100 cm)²× (1000 g)⁻²
= 6.67 × 10⁻⁸ g⁻¹cm³ s⁻²
Question 19
4 / -1

If the value of atmospheric pressure is 10⁶ dyne cm⁻², its value in SI units is

A
10⁴ N m⁻²

B
10⁶ N m⁻²

C
10⁵ N m⁻²

D
10³ N m⁻²

Solution

Pressure = F/A
∴ 10⁶ dyne cm⁻² = 10⁵ N m⁻².
Question 20
4 / -1

The solid angle subtended by the periphery of an area 1 cm² at a point situated symmetrically at a distance of 5 cm from the area is

A
2 × 10^-2 steradian

B
4 × 10^-2 steradian

C
6 × 10^-2 steradian

D
8 × 10^-2 steradian

Solution

= 4 × 10⁻² steradian

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Units and Measurements Test - 1

Result

Units and Measurements Test - 1

Score

-

Rank

-

SHARING IS CARING

Question 1

Mass

Thermodynamic temperature

Luminous intensity

Amount of substanc

Solution

Question 2

1 angstrom = 10-10 m

1 fermi = 10-15 m

1 light year = 9.46 x 1015 m

1 astronomical unit = 1.496 x 10-11 m

Solution

Question 3

Mass

Length

Time

None of these

Solution

Question 4

Time

Impulse

Mass

Kilogram

Solution

Question 5

Luminous intensity

Thermodynamic temperature

Electric current

Work

Solution

Question 6

Direct and indirect methods are used for the measurement of physical quantities.

Scientific notation and the prefixes are used to simplify numerical computation.

A dimensionally correct equation need not be a correct equation.

The SI units is based on six base units.

Solution

Question 7

Foot

Metre

Pound

Second

Solution

Question 8

Parse

Year

Second

Hour

Solution

Question 9

joule

watt

kilogram

newton

Solution

Question 10

metre

candela

ampere

pascal

Solution

Question 11

CGS

FPS

MKS

SI

Solution

Question 12

1951

1961

1971

1981

Solution

1 angstrom = 10^-10 m

1 fermi = 10^-15 m

1 light year = 9.46 x 10¹⁵ m

1 astronomical unit = 1.496 x 10^-11 m

N m^-2

N m^-1

N m^-3

1.13 × 10³

1.13 × 10²

1.13 × 10⁴

6.67 × 10⁻⁸

6.67 × 10⁻⁷

6.67 × 10⁻⁹

6.67 × 10⁻¹⁰

10⁴ N m⁻²

10⁶ N m⁻²

10⁵ N m⁻²

10³ N m⁻²

2 × 10^-2 steradian

4 × 10^-2 steradian

6 × 10^-2 steradian

8 × 10^-2 steradian