Waec Physics Past Questions For Year 1996
Question 51
Calculate the amount of heat generated in an external load of resistance 8Ω if an alternating current of peak value 5A is passed through for 100s.
- A. 20,000J
- B. 10,000J
- C. 5,000J
- D. 4,000J
- E. 200J
Question 52
The electric potential at point P in the diagram above can be expressed as
- A. Q2/(4πεor2)
- B. Q/(4πεor2)
- C. Q/(4πεor)
- D. Q2/(4πεor2)
- E. Q/(4πεor) 2
Question 53
The diagram above illustrates an isolated metal sphere carrying charge W in a medium whose permittivity is so. The magnitude of the electric field intensity at P can be expressed as
- A. Q2/(4πεor2)
- B. Q/(4πεor2)
- C. Q/(4πεor)
- D. Q2/(4πεor2)
- E. Q/(4πεor) 2
Question 54
Which of the following is used in a nuclear reactor to slow down fast-moving neutrons?
- A. Carbondioxide gas
- B. Liquid sodium metal
- C. Concrete shield
- D. Graphite rods
- E. Boron rods
Question 55
Which of the following is not part of the electromagnetic spectrum?
- A. Radio wave
- B. Gamma ray
- C. Infra-red ray
- D. Alpha particle
- E. X-ray.
