Jamb 2001 Physics Past Questions And Answers
The process of energy production in the sun is
- A. nuclear fission
- B. nuclear fussion
- C. electron collision
- D. radioactive decay
What is the angle of dip at the magnetic equator
- A. 45°
- B. 0°
- C. 90°
- D. 180°
At reasonance, the phase angle in an a.c. circuit is
- A. 90°
- B. 60°
- C. 0°
- D. 180°
The magnetic force on a charged particle moving with velocity v is
- A. proportional to both the magnitude of the charge and the velocity v
- B. independent of the magnitude of the charge
- C. proportional to the velocity v only
- D. proportional to the magnitude of the charge only
Which of the following consists entirely of vector quantities?
- A. Velocity, magnetic fulx and reaction
- B. Tension, magnetic flux and mass
- C. Displacement, impulse and power
- D. Work, pressure and moment
The force on a current carrying conductor in a magnetic field is greatest when the
- A. conductor makes an angle of 60° with the field
- B. force is idependent of the angles between the fields and the conductor
- C. conductor is parallel with the field
- D. conductor is at right angle with the field
A stone of mass 1kg is dropped from a height of 10m above the ground and falls freely under gravity. Its kinetic energy 5m above the ground is then equal to
- A. its kinetic energy on the ground
- B. twice its initial potential energy
- C. its initial potential energy
- D. half its initial potential energy
Energy losses through eddy currents are reduced by using
- A. low resistance wires
- B. insulated soft iron wires
- C. few turns of wires
- D. high resistance wires
The particles emitted when3919K decay to3919K is
- A. gamma
- B. beta
- C. electron
- D. alpha
A plane sound wave of frequency 85.5Hz and velocity 342ms-1 is reflected from a vertical wall. At what distance from the wall does the wave have antinode?
- A. 2m
- B. 4m
- C. 1m
- D. 3m