Waec Physics Past Questions For Year 1993
Question 36
A household refrigerator consumes electrical energy at the rate of 200 W. lf electricity costs 5 k per kWh, calculate the cost of operating the appliance for 30 days.
- A. N7.20
- B. N12.00
- C. N30.00
- D. N33.33
- E. N72.00
Question 37
A particle of charge 5C moves perpendicularly to a magnetic Held of magnitude C.01 T. If the velocity of the charge is 1.5ms'2, calculate the magnitude of the force exerted on the particle
- A. 0.050 N
- B. 0.075N
- C. 0.0300N
- D. 3.300N
- E. 0.000N
Question 38
Which of the following have the greatest penetrating power?
- A. Beta rays
- B. Alpha rays
- C. Gamma rays
- D. Electrons
- E. Neutrons
Question 39
The potential difference between two points A and B situated at a distance d apart is V. Which of the following expresses the magnitude of the electric field intensity between the two points assuming the field is uniform?
- A. Vd
- B. dV-1
- C. Vd-1
- D. V2d
- E. d2V
Question 40
A point charge of 1.0 x 10-7 C experiences force of 0.01 N in a uniform electric field. Calculate the magnitude of the strength of the field
- A. 106 Vm-1
- B. 105 Vm-1
- C. 10-5 Vm-1
- D. 102 Vm-1
- E. 109 Vm-1
