Waec Physics 2004 Past Questions and Answers

Question 36:

• WAEC 2004

The sound from a vibrating tuning sound is when the tip of its stem is placed on a wooden table than when in air because

A. The friction between the table and the tuning fork generates additional energy
B. Air molecules obsorb sound wave but wood transmit sound waves
C. The table increases the frequency of the turning fork
D. A large mass of air is set into vibration by the table

Question 37:

• WAEC 2004

Charges on a conductor are

A. Evenly distributed over a surface of any shape
B. Concentrate on the inner surface of the conductor
C. Concentrate at the outer flat surface of the conductor
D. Generally concentrated at sharply curved surface

Question 38:

• WAEC 2004

Which of following functions is performed by manganese IV oxide in the Lenclanche cell?

A. Control of local action
B. Depolarisation of the cell
C. Regulating current flow in the cell
D. Reduction of the internal resistance of the cell

Question 39:

• WAEC 2004

A car fuse marked 3A operates optimally on a 12V battery, calculate the resistance of the fuse

A. 36.0\(\Omega\)
B. 15.0\(\Omega\)
C. 9.0\(\Omega\)
D. 4.0\(\Omega\)

Question 40:

• WAEC 2004

Find the cost of running a 60W lamp for 24 hours. If 1kW hr cost 5 naira

A. 14.4 naira
B. 12.5 naira
C. 7.2 naira
D. 2.0 naira