Waec Physics 2003 Past Questions and Answers

Question 41:

• WAEC 2003

Which of the following statements is true of ultra violet radiations? It

A. Supports the sensation of hearing
B. Does not cause the emission of electrons from metals
C. Is an electromagnetic wave
D. Is not capable of causing sun burns

Question 42:

• WAEC 2003

A radioactive element has a decay constant of 0.077s^-1, calculate its half life

A. 12.5s
B. 9.0s
C. 5.1s
D. 0.5s

Question 43:

• WAEC 2003

The minimum energy required to remove an electron from an atom is known as

A. Excitation energy
B. Ionization energy
C. Binding energy
D. Photon energy

Question 44:

• WAEC 2003

Nuclear fission is preferred to nuclear fusion in the generation of energy because

A. Very high temperature are required for fusion
B. The raw material of fusion are not easily obtained
C. Energy obtained from fusion is relatively smaller
D. The by product of fusion are very dangerous

Question 45:

• WAEC 2003

Which of the following reactions represents nuclear fusion?

A. \(^2_1H + ^2_1H \to ^3_2He + ^1_0n\)
B. \(^235_92U + ^1_0n \to ^145_56Ba + ^90_36Kr \)
C. \(^234_90TH \to ^0_-1n + ^3_2He + ^1_0Pa\)
D. \(^238_92U \to ^4_2H \to ^3_2He + ^234_90Th\)