# A level Physical Quantities, Units, Measurements and Dimensions Quiz 1

#### Quiz Description

This is a combined quiz that will be looking at many different aspects of Physics to be precise. In this quiz, we will talk about Physical quantities which we measure with the use of units and Dimensions. This quiz will help you understand things like distance being a physical quantity( a fundamental one at that) and how it is measured and its unit of measurement. It is therefore important for you to take this quiz seriously as you may be tested in school or during examinations practically and not just theoretically.

A Physical quantity is simply a physical property that can be quantified or measured. These quantities are measured using numbers or figures which all end with units and these units in simple words mean the magnitude of a quantity. For example, we have time to be a physical quantity, with units of seconds (s), measured using a stopwatch or simply watch.
The dimension of a physical quantity is defined as the number of times the fundamental units of mass, length, and time appear in the physical quantity.

This particular topic(s) in physics is very useful in all fields as concerns engineering and life as a whole, so be sure to take the quiz, for you will find it very educational and worth it.
Good luck!

Light year is a unit of

Correct
• time
• distance
• sunlight intensity
• mass

[M(L)^-1(T)^-2] is the dimensional formula of

Correct
• force
• coefficient of friction
• modulus of elasticity
• energy

The dimensions of Kinetic energy is same as that of

Correct
• Force
• Pressure
• Work
• Momentum

On the basis of dimensional equation, the maximum number of unknown that can be found, is

Correct
• 1
• 2
• 3
• 4

Which of the following pairs has the same dimensions?

Correct
• Specific Heat and Latent Heat
• Impulse and Momentum
• Surface Tension and Force
• Moment of Inertia and Torque

If v stands for velocity of sound, E is elasticity and d the density, then find x in the equation v = (d/E)^x

Correct
• 1
• 1/2
• 2
• -1/2

Electron volt is a unit of

Correct
• Charge
• Energy
• Potential difference
• Magnetic Force

The multiplication of 10.610 with 0.210 upto correct number of significant figure is

Correct
• 2.2281
• 2.228
• 2.22
• 2.2

There are 20 divisions in 4 cm of the main scale. The vernier scale has 10 divisions. The least count of the instrument is

Correct
• 0.05 cm
• 0.5 cm
• 5.0 cm
• 0.005 cm

How many numbers of base SI units are there?

Correct
• 5
• 10
• 7
• 9

What is the percentage error in the measurement of the kinetic energy of a body, if there is a positive error of 50% in the speed of the body

Correct
• 125%
• 30%
• 50%
• 100%

The measurement of radius of a circle has error of 1%. The error in measurement of its area is

Correct
• 1%
• 2%
• 3%
• None of these

Identify the physical parameters that are having the same dimensions from the below-given list:

(i) Magnetic field

(ii) Energy density

(iii) Refractive index

(iv) Young’s modulus

(v) Dielectric constant

Correct
• (ii) and (iv)
• (i) and (v)
• (iii) and (iv)
• (iv) and (iii)

If length of pendulum is increased by 2%. The time period will

Correct
• increases by 1%
• decreases by 1%
• increases by 2%
• decreases by 2%

Three measurements 7.1 J, 7.2 J and 6.7 J are made as experiment the result with correct number of significant figures is

Correct
• 7.1 J
• 7.06 J
• 7.0 J
• 7J

divisions are the circular scale reading

What is the diameter of the wire if 1 mm on the main scale is equal to the 100 divisions on the circular scale

Correct
• 0.016 cm
• 0.052 cm
• 0.15 cm
• 0.05 cm