physics

The image of any real object formed by a diverging lens is always?

A. inverted B. magnified C. erect D. real E. the same size as the object Correct Answer: Option C -…

5 years ago

Light travels in straight lines. In which of the following is this principle manifested?

I. Pinhole camera II Formation of shadows III. Diffraction of light IV. Occurrence of eclipse A. I and III only…

5 years ago

A ray of light is incident on a body x as shown in the diagram below. What is the refractive index of the body?

A. 1.63 B. 1.50 C. 1.49 D. 1.33 E. 1.02 Correct Answer: Option A - 1.63

5 years ago

A ray of light is incident on mirror m1 and after reflection is incident on mirror m2 as shown in the diagram, calculate the angle of reflection of the ray at mirror m2

A. 120° B. 90° C. 60° D. 45° E. 30° Correct Answer: Option E - 30°

5 years ago

How much heat is required to convert 20 g of ice at 0°C to water at the same temperature? (Specific latent heat of ice = 336 J g-1)

A. 1.35 x 10³J B. 5.38 x 10³J C. 6.72 x 10³J D. 7.06 x 10³J E. 8.06 x 10³J…

5 years ago

A brass rod is 2 m long at a certain temperature. Calculate the linear expansion of the rod for a temperature change of 100K. (Take the linear expansivity of brass as 1.8 x 10^5K).

A. 0.3600 m B. 0.1800 m C. 0.0360 m D. 0.0036m E. 0.0018 m Correct Answer: Option D - 0.0036m

5 years ago

A mercury-in-glass thermometer reads – 20° at the ice point and 100° at the steam point. Calculate the Celcius temperature corresponding to 70° on the thermometer.

A. 41.0°C B. 50.0°C C. 62.5°C D. 70.0°C E. 75.0°C. Correct Answer: Option E - 75.0°C.

5 years ago

A body weighing 10 N in air is partially immersed in water. It displaces water of mass 0.3 kg. What is the upthrust on the body? (g = 10 ms-2)

A. 13.0 N B. 7.0 N C. 3.3N D. 3.0N E. 0.3 N. Correct Answer: Option D - 3.0N

5 years ago

A machine has an efficiency of 60%. If the machine is required to overcome a load of 30 N with a force of 20 N. Calculate its mechanical advantage?

A. 0.7 B. 0.9 C. 1.5 D. 2.5 E. 10.0 Correct Answer: Option C - 1.5

5 years ago

A car travelling at a uniform speed of 120kmh−¹ passes two stations in 4 minutes. Calculate the distance between the two stations.

A. 8km B. 15km C. 22km D. 30km E. 60km Correct Answer: Option A - 8km

5 years ago
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