physics

Two plane mirrors are inclined at an angle 20° to each other. Determine the number of images formed when an object is placed between them.

A. 17 B. 18 C. 19 D. 20 Correct Answer: Option A A. 17

6 years ago

A converging lens of focal length 10cm forms an erect image three times the size of the real object. Calculate the distance between the image and the object.

A. 6.6cm B. 11.1cm C. 13.3cm D. 20.0cm Correct Answer: Option C Explanation Given, image size = 3U object size…

6 years ago

The diagram above illustrates a wave setup between two fixed ends 4.0m apart. If the speed of the wave is 1.0ms‾¹, its wavelength and frequency respectively are?

A. 1m; 0.25Hz B. 2m; 0.25Hz C. 2m; 0.50Hz D. 4m; 0.50Hz Correct Answer: Option C C. 2m; 0.50Hz Explanation…

6 years ago

A ray of light incident at an angle θ in a rectangular prism grazes the surface of the prism on emerging from the prism. Determine the value of the angle. [Absolute refractive index of the material of the prism is 1.5]

A. 41.8° B. 48.2° C. 60.8° D. 90.0° Correct Answer: Option A A. 41.8° Explanation η=1/sinθ 1.5=1/sinθ sinθ=1/1.5 = 0.667…

6 years ago

Plane waves through a narrow gap emerge as circular waves. This phenomenon is known as?

A. interference B. dispersion C. refraction D. diffraction Correct Answer: Option D D. diffraction Explanation Diffraction refers to the various…

6 years ago

Consider the wave equation: y=10sin(x−50t), What does the number 10 represent?

A. Acceleration B. Speed C. Amplitude D. Wavelength Correct Answer: Option C C. Amplitude Explanation Comparing the given equation with…

6 years ago

Which of the following statements about the 3rd overtone of a vibrating air column of an open pipe is correct? It has?

A. 4 nodes B. 5 nodes C. 3 antinodes D. 4 antinodes Correct Answer: Option A A. 4 nodes Explanation…

6 years ago

A rainbow is formed when sunlight is incident on water droplets suspended in the air due to?

A. interference B. refraction C. dispersion D. diffraction Correct Answer: Option C C. dispersion

6 years ago

The diagram above illustrates two waves of equal amplitudes A and frequencies approaching each other. When the two waves meet at a point I midway between them, the vertical displacement of the resulting wave will be?

A. 0 B. A2 C. A4 D. 2A Correct Answer: Option D D. 2A Explanation This is a type of…

6 years ago

A vapour whose molecules are in dynamic equilibrium with those of its own liquid is said to be?

A. unsaturated B. gaseous C. saturated D. diffused Correct Answer: Option C C. saturated Explanation A saturated vapour is one…

6 years ago
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