Waec Physics 1999 Past Questions and Answers

Question 31:

• WAEC 1999

Thunder is usually heard some seconds after lightning is observed because

A. The human eye is more sensitive to light than the ear to sound
B. Sound and light travel in different media
C. Thunder occurs after lightning
D. Light travels faster than sound

Question 32:

• WAEC 1999

Using the data on the diagram above, calculate the potential difference across the 20- Ω resistor. (Neglect the internal resistance of the cell)

A. 5V
B. 10V
C. 20V
D. 60V

Question 33:

• WAEC 1999

Using the diagram above, calculate the effective capacitance of the circuit

A. 1.56μf
B. 3.00μF
C. 3.71μF
D. 9.00μF

Question 34:

• WAEC 1999

The parts of a bar magnet at which the magnetic effect is strongest are called the

A. Poles
B. Neutral points
C. Magnetic declinations
D. Magnetic meridians

Question 35:

• WAEC 1999

A resistance wire of length 2 m and of uniform cross-sectional area 5.0 x 10^-7 m² has a resistance of 2.2 Ω Calculate its resistivity

A. 1.8 x 10^-7Ωm
B. 5.5 x 10^-7Ωm
C. 1.8 x 10^-7Ωm
D. 5.8 x 10⁷Ωm