Waec Physics Past Questions For Year 1996
Question 11
A platinum-resistance thermometer has a resistance of 5Ω at 0°C and 9Ω at l00°C. Assuming that resistance changes uniformly with temperature, calculate the resistance of the thermometer when the temperature is 45°C.
- A. 13.9 Ω
- B. 8.9 Ω
- C. 6.8 Ω
- D. 3.2 Ω
- E. 1.8 Ω
Question 12
Two simple pendula x and y make 400 and 500 oscillations respectively in equal time. If the period of oscillation of x is 1.5 seconds, what is the period of oscillation of y?
- A. 0.53s
- B. 0.83s
- C. 1.20s
- D. 1.50s
- E. 1.88s.
Question 13
A stationary object of mass 4kg is set in motion by a net force of 5ON. If the object attains is speed of 5ms-1 in time. Calculate the value of t.
- A. 0.20s
- B. 0.40s
- C. 0.63s
- D. 0.80s
- E. 1.30s
Question 14
A body of mass 2kg is suspended from the ceiling of a lift with a light inextensible string. lf the lift moves upwards with acceleration of 2ms-2, calculate the magnitude of the tension in the string (g = 1Oms-2)
- A. 24N
- B. 20N
- C. 16N
- D. 4N
- E. 0N
Question 15
The heating element in an electric kettle is usually located near the bottom of the kettle because
- A. water is a good conductor of heat
- B. heat can be more quickly radiated to all parts of the water
- C. no heat can be lost to the surroundings
- D. the convectional currents which are set up can carry heat to all parts of the water
- E. the molecules of the heating element can carry heat to all parts of the water.
