Waec Physics 2005 Past Questions and Answers

Question 41:

• WAEC 2005

The mass and weight of a body on earth are 8kg and 80N respectively. Determine the mass and weight of the body respectively on a planet where the pull of gravity is \(\frac{1}{8}\) that on earth

A. 8kg, 8N
B. 1kg, 10N
C. 64kg, 10N
D. 8kg, 10N

Question 42:

• WAEC 2005

Lenz's law of electromagnetic induction states that

A. A force is exerted on a current-carrying conductor in a magnetic field
B. Electromotive force id induced in a circuit whenever there is a change in the magnetic flux linked with the circuit
C. The magnitude of the induced electromotive force in a circuit is proportional to the rate of change of flux linking the circuit
D. The induced current in a coil is in such a direction that it sets up a magnetic field which opposes the change producing it

Question 43:

• WAEC 2005

A bar magnet is placed near and lying along the axis of a solenoid connected to a galvanometer. The pointer of the galvanometer shows no deflection when

A. The magnet is moved away from the stationary solenoid
B. The solenoid is moved away from the stationary magnet
C. The magnet is moved towards the stationary solenoid
D. There is no relative motion between the magnet and the solenoid

Question 44:

• WAEC 2005

an electric motor is a machine that converts

A. Mechanical energy into electrical energy
B. Electrical energy into mechanical energy
C. High voltage to low voltage
D. Low voltage to high voltage

Question 45:

• WAEC 2005

Which of the following statements is an advantage of nuclear fusion over nuclear fission?

A. The resulting chain reaction which produces large amount of energy
B. No radioactve wave is produced as bye product
C. Very high temperature is required in the process
D. The end product is lead