Waec Physics 1994 Past Questions and Answers

Question 21:

• WAEC 1994

A car fuse is marked 15A and operates normally on a 12V battery. Calculate the resistance of the fuse wire

A. 180Ω
B. 27Ω
C. 3Ω
D. 1.3Ω
E. 0.8Ω

Question 22:

• WAEC 1994

A particle of charge q and mass m moving with a velocity v enters a uniform magnetic field of strength B in the direction of the field. The force on the particle is

A. QvB
B. MqvB
C. QvB/m
D. MvB/q

Question 23:

• WAEC 1994

A lamp marked 100W, 250V is lit for 10 hours. If it operates normally and 1KWh of electrical energy costs 2k, what is the cost of lighting the lamp?

A. 1k
B. 2k
C. 5k
D. 10k
E. 20k

Question 24:

• WAEC 1994

Which of the following is a stringed instrument?

A. Flute
B. Trumpet
C. Piano
D. Drum
E. Organ

Question 25:

• WAEC 1994

A transformer with 5500 turns in its primary winding is used between a 240V a.c supply and 120V kettle. Calculate the number of turns in the secondary winding

A. 11000
B. 2750
C. 460
D. 550
E. 232