Waec Physics 2011 Past Questions and Answers

Question 46:

• WAEC 2011

Uranium-234 disintegrated to form Thorium-230 by emitting

A. Alpha particles
B. Gamma rays
C. Beta negative rays
D. Beta positive rays

Question 47:

• WAEC 2011

The change in mass of fuel during a nuclear reaction is 2.0 x 10^-27 kg. Calculate the amount of energy released. (Speed of light = 2.0 x 10⁸ms^-1)

A. 1.8 x 10^-10J
B. 9.0 x 10^-11J
C. 6.0 x 10^-19J
D. 1.2 x 10^-45J

Question 48:

• WAEC 2011

Nuclear fusion is not used as a source of enegy because

A. Very high temperature is needed for the reaction
B. The fuel for the reaction is not easy to obtain
C. Less energy is released
D. The reaction is too slow

Question 49:

• WAEC 2011

Using the circuit diagram above. Calculate the total charge in the circuit

A. 80\(\mu C\)
B. 35\(\mu C\)
C. 20\(\mu C\)
D. 16\(\mu C\)

Question 50:

• WAEC 2011

Using the circuit diagram above. Calculate the potential difference across the capacitors in parallel

A. 10.0V
B. 8.0V
C. 6.7V
D. 2.0V