Waec Physics 2000 Past Questions and Answers

Question 36:

• WAEC 2000

In the diagram above, the current passing through the 6\(\Omega\) resistor is 1.5A. Calculate the current in the 30\(\Omega\) resistor

A. 1.20A
B. 0.90A
C. 0.75A
D. 0.60A

Question 37:

• WAEC 2000

In the diagram given, the current passing through the 6\(\Omega\) resistor is 1.5A. Calculate the terminal p.d. of the battery in the diagram

A. 7.50V
B. 9.00V
C. 10.80V
D. 1.25V

Question 38:

• WAEC 2000

An immersion heater is rated 120W. How long does it take the heater to raise the temperature of 1.2kg of water by 15^oC. (Assuming heat lost to the surrounding is negligible. Specific heat capacity of water = 4200 Jkg^-1K^-1C)

A. 65.0 minutes
B. 60.0 minutes
C. 52.5 minutes
D. 10.5 minutes

Question 39:

• WAEC 2000

The region around a magnet in which the magnetic influence is experienced is called

A. Magnetic flux
B. Magnetic field
C. Magnetic meridian
D. Magnetic declination

Question 40:

• WAEC 2000

A device used to prevent wearing away of the make and-brake contacts of an induction coil is called a\an

A. Fuse
B. Electroscope
C. Resistor
D. Capacitor