PHYSICS

Which of the following is a physical quantity that has a magnitude but no direction?

• Vector

• Frame of reference

• Resultant

• Scalar

Which form of nuclear radiation is most penetrating?

• They all have the same penetrating power

• Gamma

• Alpha

• Beta

What is 1.2 kV in V?

A 1500 kg car is moving at 20 m/s. Calculate the energy in its kinetic store in Joules.

• 30000J

• 15000J

• 300000J

• 22500000J

A 160 g cricket ball is moving at 40 m/s. Calculate the energy in its kinetic store.

• 128000J

• 3.2J

• 3200J

• 128J

What are the S.I. units of measurement of distance?

• Millimeters

• meters

• inches

• centimeters

A bar magnet is surrounded by a magnetic field. Where is the magnetic field strongest?

• At the poles of the magnet

• In the centre of the magnet

  
  

• At the south pole of the magnet

• At the north pole of the magnet

How could the strength of the magnetic field in a solenoid be increased?

• 
  Add an iron core

• 
  Decrease the current flowing

• Decrease the number of coils on the solenoid

• 
  Add an aluminium core

A block of concrete is cuboid in shape and has a length of 0.5 m, width of 2 m and height of 1.5 m. Calculate the density of the concrete, given that its mass is 3600 kg.

• 
  0.0004 kg/m³

• 900 kg/m³

• 2400 kg/m³

• 5400 kg/m³

What is meant by the term wavelength?

• The distance from the rest position to a peak

• The distance from a peak to the next peak

• The distance travelled by the wave each second

• 
  The highest point on the wave