physics

When very hot water is poured into two identical thin and thick glass tumblers in equal volumes; the thick one cracks because?

A. of the even expansion of glass B. glass is a crystal C. glass is a good conductor of heat…

4 years ago

Which combination of the below is evidence of the molecular nature of matter?

I. Melting II. Boiling III. Refraction IV. Conduction A. II, III and IV only B. I, II and IV only…

4 years ago

The process whereby a liquid turns spontaneously into vapour is called?

A. regelation B. sublimation C. boiling D. evaporation Correct Answer: Option D - evaporation

4 years ago

The quantities of a good thermometer include?

I. reproducibility II. Sensibility III. High terminal capacity iv. High accuracy A. I, II and IV only B. I, III…

4 years ago

The process whereby the molecules of different substances move randomly is called?

A. capillarity B. surface tension C. osmosis D. diffusion Correct Answer: Option D - diffusion

4 years ago

A body of mass 36kg falls through a viscous liquid which offers a drag force of 260N on the body. The upthrust on the body at terminal velocity is? [g = 10ms−²]

A. 100N B. 620N C. 50N D. 310N Correct Answer: Option A - 100N Explanation For anybody falling through a…

4 years ago

When the temperature difference between the wet and dry bulbs of a hygrometer is high, this indicates that?

A. it is about to rain B. the relative humidity is high C. there is plenty of sunshine D. the…

4 years ago

Which of the following materials is a conductor?

A. Glass B. Wax C. Sodium D. Plastic Correct Answer: Option C - Sodium

4 years ago

The current in a reverse-biased junction is due to?

A. minority carriers B. electrons C. majority carriers D. holes Correct Answer: Option A - minority carriers Explanation The current…

4 years ago

A transformer is rated 240V. If the primary coil is 4000 turns and the secondary voltage 12V; determine the number of turns in the secondary coil.

A. 200 B. 100 C. 250 D. 150 Correct Answer: Option A - 200 Explanation in a transformer, ES/EP =…

4 years ago