Physics Past Questions and Answers

All of the following frequencies are overtones of 320 Hz EXCEPT

A 960Hz
B 640Hz
C 520Hz
D 1280Hz
E 1600Hz

Question 22:

The driver in a motor car, of which the total mass is 800kg and which is traveling at 20ms^-1, suddenly observes a stationary dog in his path 50m ahead. If the car brakes can exert a force of 2000N, what will most likely happen?

A The car will be able to stop immediately the driver notices the dog
B The car will stop 3pm after hitting the dog
C The car will stop 20m in front of the dog
D The driver will quickly reverse the car
E The car will stop 5m beyound the dog

Question 23:

The absolute refractive indices of glass and water are \(\frac{3}{2}\) and \(\frac{4}{3}\) respectively. The refractive index at the interface when a ray travels from water to glass is

A \(\frac{1}{2}\)
B \(\frac{8}{9}\)
C \(\frac{9}{8}\)
D \(\frac{17}{12}\)
E 2

Question 24:

Which of the following statements is CORRECT?

A Charges generated on glass rubbed with silk are called negative
B Charges in various media can be carried by protons detached from their atom
C The magnitude of any charge is a multiple of the charge of an electron
D The intensity of an electric field is a scalar quantity
E If 500 joules of work are required to move a 2-coulomb charge between two points, the potential difference between the two point is 100V

Question 25:

Which type of radiation does not NOT originate within the nucleus?

A Alpha
B Beta
C Gamma
D Neutron
E X-rays