Waec Physics 1993 Past Questions and Answers

Question 46:

• WAEC 1993

Calculate the current, I in the diagram shown above.
(Neglect the internal resistance of the cell)

A. 4.0A
B. 2.0A
C. 1.0A
D. O.5A
E. 0.1A.

Question 47:

• WAEC 1993

Which of the following is not a conductor of electricity?

A. Human body
B. Glass
C. Silver
D. Earth
E. Copper

Question 48:

• WAEC 1993

ln the diagram below, the galvanometer indicates a null-deflection. What is the potential difference between P and Q?

A. 0.0 V
B. 1.5 V
C. 2.0 V
D. 3.0V
E. 4.0 V.

Question 49:

• WAEC 1993

When a potential difference, V is applied across the ends of a resistor of resistance, R a Current, l passes through the resistor. The heat generated in the resistor in time, t is given by the expression

A. V²lt
B. I²t/R
C. L²Rt
D. LR²tR
E. V²Rt

Question 50:

• WAEC 1993

Electric motor primarily converts

A. Electrical energy into chemical energy
B. Electrical energy into heat energy
C. Kinetic energy into potential energy
D. Electrical energy into mechanical energy
E. Mechanical energy into light energy