Waec Physics Past Questions
Question 1731
Arrange the following radiations in order of increasing ionization of air.
I. Alpha
Il. Gamma
IIl. Beta
- A. Alpha
- B. I < III < II
- C. II < I < III
- D. II < III < I
- E. I < II
Question 1732
In doping an intrinsic semiconductor to produce a p-type semiconductor,
- A. the semiconductor is heated up
- B. a donor element is added
- C. an acceptor element is added
- D. the semiconductor is conducted to a battery
Question 1733
The diameter of a brass ring at 30 °C is 50.0 cm. To what temperature must this ring be heated to increase its diameter to 50.29 cm? [ linear expansivity of brass = 1.9 x 10\(^{-5}\) K\(^{-1}\)]
- A. 152.6 °C
- B. 182.6 °C
- C. 306.1 °C
- D. 335.5 °C
Question 1734
Which of the following statements-about electromagnetic waves is not correct?
- A. They carry energy as they travel through space
- B. They travel with the speed of light
- C. They are longitudinal
- D. The electric and magnetic fields are at right angles to each other
Question 1735
The distance between the fixed points of a mercury-in-glass thermometer is 30 cm. Determine the temperature when the mercury level is 10.5 cm above the lower fixed point
- A. 28.6ºC
- B. 30.0 ºC
- C. 35.0 ºC
- D. 40.5 ºC
