Physics Past Questions And Answers
The maximum and minimum thermometer reads the
- A. the maximum temperature during the day and the minimum temperature at night at all times.
- B. the maximum temperature at night and minimum temperature during the day from the last reset
- C. the maximum temperature at night and minimum temperature during the day at all times
- D. the maximum temperature during the day and minimum temperature at night from the last reset
In a good thermos flask, the main cause of heat loss is?
- A) conduction through the cork
- B) the plastic base of the thermos flask
- C) the silvered walls and shiny metals
- D) the outer cover or jacker
The apparent weight of a body fully immersed in water is 32N and its weight in air is 96N. Calculate the volume of the body. [Density of water = 1000kgm-3, g = 10ms-2]
- A. 8.9 x 10-3m3
- B. 6.4 x 10-3m3
- C. 3.2 x 10-3m3
- D. 3.0 x 10-3m3
The mechanism of heat transfer from one point to another through the vibration of the molecules of the medium is
- A. convection
- B. conduction
- C. radiation
- D. diffusion
In which of the following media would sound waves travel fastest?
- A. Kerosine
- B. Alcohol
- C. Water
- D. lron
Calculate the apparent weight loss of a man weighing 70kg in an elevator moving downwards with an acceleration of 1.5ms-2. [g = 10ms-2]
- A. 686N
- B. 595N
- C. 581N
- D. 105N
Which of the following phenomena supports the theory that waves have a particle nature?
- A. electron diffraction
- B. photoelectric effect
- C. diffraction of light
- D. x-ray interference
The motion of a body is simple harmonic if the?
- A. acceleration is always directed towards a fixed point
- B. path of motion is a straight line
- C. acceleration is proportional to the square of the distance from a fixed point
- D. acceleration is constant and directed towards a fixed point
To convert a galvanometer to a voltmeter, a
- A. high resistance is connected to it in series
- B. high resistance is connected to it in parallel
- C. low resistance is connected to it in parallel
- D. low resistance is connected to it in series
the factor which enables the ear to distinguish between a note played on different instruments is the
- A. pitch
- B. speed
- C. harmonics
- D. loudness