What happens to a water pool on a day when the humidity of the air is very low?

• A. Temperature decreases
• B. Slow evaporation
• C. Temperature increases
• D. Rapid evaporation

List three phenomena which can be explained by the molecular theory of matter.

The diagram given illustrates a force-distance graph for the motion of a wooden block. Determine the work done on the block when moved through a distance of 5m.

• A. 4J
• B. 15J
• C. 5J
• D. 100J

In the diagram shown, If the south-poles of two magnets stroke a steel bar, the polarities at T and V will respectively be

• A. north and south
• B. south and south
• C. north and north
• D. south and north

Which of the following statements about defects of vision is/are CORRECT?

I. For a long sighted person, close objects appear blurred

II. For a short sighted person, distant objects appear blurred

III. Short sight is corrected by using a pair of converging lenses

• A. I only
• B. II only
• C. I and II only
• D. II and III only

A car starts from rest and covers a distance of 40m in 10s. Calculated the magnitude of its acceleration

• A. 3.20ms^-2
• B. 0.25ms^-2
• C. 0.80ms^-2
• D. 4.00ms^-2

A simple magnifying glass is used to view an object. At what distance from the lens must the object be placed so that an image 5 times the size of the object is produced 20cm from the lens?

• A. 2cm
• B. 4cm
• C. 15cm
• D. 25cm

The speed of light in a certain medium is V while its speed in a vacuum is C. The absolute refractive index of the medium is

• A. C + V
• B. \(\frac{C}{V}\)
• C. \(\frac{V}{C}\)
• D. C - V

Humidity is used to describe the amount of

• A. air in water vapour
• B. cloud available in the atmosphere
• C. air in equal volume of cloud
• D. water vapour in the amosphere

Three 4Ω resistors connected in parallel have a potential difference of 16 V applied across them. What is the total current in the circuit?

• A) 14 A
• B) 12 A
• C) 10 A
• D) 8 A