Olevel Physics Physical Quantities Units & Measurements (10 qns)

Diagram 1 shows the reading of a vernier caliper with jaws closed. Diagram 2 shows the reading with jaws closed around the diameter of a glass rod. What is the diameter of the glass rod?

• 1.27 cm

• 1.33 cm

• 1.37 cm

• 1.43 cm

What is the thickness of the metal sheet?

• 5.83 mm

• 7.33 mm

• 7.83 mm

• 10.33 mm

Which option is made up of a base unit and a derived unit?

• ampere and joule

• coulomb and volt

• kelvin and second

• pascal and newton

Which statements describe vector quantities?

• A plane flies due North for 500 km

• A tourist travels 100 km on a journey

• A snail crawls at 3 mm/s in a straight line towards a carrot

• A runner's average speed in a race around a track is 5 m/s

Which is a scalar quantity?

• weight

• electric field

• moment of a force

• electromotive force

A student needs to measure a distance of about 2 cm to a precision of 0.001 cm. Which measuring instrument should be used?

• metre rule

• micrometer

• measuring tape

• vernier calipers

Two forces are acting at a point Y which are represented by YX and YZ respectively. Which option represents a third force that is required to maintain equilibrium?

• YW

• WY

• XZ

• ZX

Which vector addition shows correctly the addition of two forces?

• 
• 
• 
• 

How can the periodic time of a simple pendulum be significantly reduced?

• By increasing the mass of the pendulum

• By decreasing the mass of the pendulum

• By increasing the length of the pendulum

• By decreasing the length of the pendulum

It takes 1.5 s for the pendulum to swing from X to Y. How many complete oscillations are there in 1 minute?

• 10

• 20

• 40

• 80