Physics 1994 Waec Past Questions and Answers

Question 16 :

• WAEC 1994

The electrical energy supplied by a Leclanche cell is obtained from the

A. Nuclear energy
B. Magnetic energy
C. Solar energy
D. Chemical energy
E. Mechanical energy

Question 17 :

• WAEC 1994

Which of the following is not a part of an A.C generator?

A. Carbon brushes
B. Slip rings
C. Commutator
D. Field magnet
E. Armature

Question 18 :

• WAEC 1994

Which of the following scientists postulated that moving particles exhibit wave properties?

A. Niels Bohr
B. Ernest Rutherford
C. Werner Heisenberg
D. Louis de Broglie
E. Erwin Schroedinger

Question 19 :

• WAEC 1994

A battery of e.m.f 10V an internal resistance 2Ω is connected to a resistance of 6Ω. Calculate the p.d

A. 8.75V
B. 7.50V
C. 5V
D. 2.50V
E. 1.25V

Question 20 :

• WAEC 1994

A rectangular coil can rotate in a magnetic field. The two ends of the coil are soldered respectively to the two halves of a commutator. Two carbon brushes are made to press lightly against the commutator and when these are connected in a circuit with a battery and a rheostat, the coil rotates. This is a description of

A. A moving coil ammeter
B. A D.C generator
C. A D.C electric motor
D. An induction coil
E. An A.C generator