SS1 Physics 1st Term

1. Which of the following about friction is/are correct? I. Friction depends on the nature of the surfaces in contact. II. Friction depends on the area in contact. III. Friction always acts in the direction of motion.

2. Which of the following instruments may be used to measure relative humidity?

1988, Q23; 1992, Q19; 1994, Q20

3. When a cylinder rolls down an inclined plane, it has one or more of the following types of motion:

I. Oscillatory

II. Random

III. Rotational

IV. Translational

4. An object is said to undergo oscillatory motion when it moves

2006, Q5

5. According to Newton’s law of cooling, the heat energy lost per unit area of a body depends on the

I. Surface area

II. Nature of the surface

III. Temperature of the surface

IV. Excess temperature over the surroundings WAEC 2018 Q12

6. In which of the following situations is photoelectric effect employed?

I. Automatic devices for switching on light at dusk

II. Automatic doors in departmental stores

III. Automatic devices for switching on air conditioners

IV. Automatic voltage stabilizers WAEC 2018 Q47

7. The S.I. units of frequency, period and amplitude of a wave are respectively

2006, Q28

8. Which of the following quantities are dimensionally independent? I. Dielectric constant II. Momentum III. Efficiency IV. Refractive index WAEC 2018 Q9

9. Which of the following is not an example of a force?

1993, Q1

10. The S.I unit for sound energy is — WAEC 2018 Q1