Physics Past Questions and Answers

Notes of the same frequency sounded on a guitar and trumpet may differ in

I. loudness
II. Pitch
III. quality Which of the statements above is correct?

A I only
B II only
C III only
D I and II only
E I, II and III

Question 247:

The amplitude of oscillation of a simple pendulum bob diminishes slowly because ____________

A Energy is applied by some external agencies
B Frictional forces dissipate the energy of motion
C The frequency of oscillation increases with the mass of the bob
D The frequency of oscillation varies with time
E The period of oscillation varies with time.

Question 248:

The wave theory of light does not explain photoelectricity because ____________

A Light waves carry little energy
B Particles cannot be emitted by waves
C The frequency of light waves too high
D There is a threshold wavelength for electron emission
E The wavelength of Light waves is too short.

Question 249:

The most suitable instrument for measuring the diameter of a thin wire is a ____________

A Meter rule
B Micrometer screw gauge
C Pair of dividers
D Pair of engineer’s calipers
E Venire calipers

Question 250:

The angle between the geographic and the magnetic meridians at a place on the earth’s surface is the ____________

A Angle of declination
B Angle of depression
C Angle of dip.
D Latitude of the place
E Longitude of the place