Physics 1996 Waec Past Questions and Answers

Question 51 :

• WAEC 1996

The diagram above illustrates an isolated metal sphere carrying charge W in a medium whose permittivity is so. The magnitude of the electric field intensity at P can be expressed as

A. Q²/(4πε_or²)
B. Q/(4πε_or²)
C. Q/(4πε_or)
D. Q²/(4πε_or²)
E. Q/(4πε_or) ²

Question 52 :

• WAEC 1996

The electric potential at point P in the diagram above can be expressed as

A. Q²/(4πε_or²)
B. Q/(4πε_or²)
C. Q/(4πε_or)
D. Q²/(4πε_or²)
E. Q/(4πε_or) ²

Question 53 :

• WAEC 1996

Calculate the amount of heat generated in an external load of resistance 89 if an alternating current of peak value 5A is passed through for 100s.

A. 20,000J
B. 10,000J
C. 5,000J
D. 4,000J
E. 200J

Question 54 :

• WAEC 1996

ln the diagram above, the resistor has a resistance 8 Ω while the reactances of the inductor and the capacitor are 10 Ω and 16 Ω respectively Calculate the current in the circuit

A. 3.6A
B. 3.8A
C. 9.2A
D. 10.0A
E. 13.0A

Question 55 :

• WAEC 1996

The resistance in a series R-C circuit is 5 Ω. If the impedance of the circuit is 13 Ω, calculate the reactance of the capacitor

A. 65 Ω
B. 18 Ω
C. 16 Ω
D. 14 Ω
E. 12 Ω