Physics - Comprehensive Mock Test 5

Question 41 Medium

The projection of the particle moving in a circle with non-uniform speed executes?

A) S.H.M B) Vibratory motion C) Both (b) and (d) D) None S.H.M

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Question 42 Medium

The product of frequency and time period is equal to?

A) 1 B) 2 C) 3 D) 4

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Question 43 Medium

The force responsible for the vibratory motion of the simple pendulum is?

A) mg sec (theta) B) mg sin (theta) C) mg cos(theta) D) mg tan (theta)

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Question 44 Medium

The number 76.85 is rounded off upto two significant figures as?

A) 76.8 B) 77 C) 76.9 D) none of these

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Question 45 Easy

How many main frontiers of fundamental science?

A) 1 B) 2 C) 3 D) 4

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Question 46 Medium

If electric resistance is to be decreased, then the number of resistances should be connected in………………?

A) Series B) Parallel C) Mixed arrangement D) Mixed arrangement

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Question 47 Medium

Which of the following Scientist proved that the path of each planet around the Sun is elliptical?

A) Galileo B) Newton C) Copernicus D) kepler

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Question 48 Easy

The phenomenon which causes mirage is?

A) Total internal reflection B) Diffraction C) Polarisation D) Interference

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Question 49 Medium

Optic fibres are mainly used for which of the following ?

A) Communication B) Weaving C) Musical instruments D) Food industry

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Solution Breakdown:

Optical fibers are used most often as a means to transmit light between the two ends of the fiber and find wide usage in fiber-optic communications, where they permit transmission over longer distances and at higher bandwidths (data rates) than wire cables.

Question 50 Easy

Who discovered Penicillin?

A) Robert Koch B) Sir Alexander Fleming C) Watson and Crick D) Louis Pasteur

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Solution Breakdown:

The first antibiotic, penicillin, was discovered by Alexander Fleming in 1928. He noticed that some bacteria he had left in a petri dish had been killed by naturally occurring penicillium mould. Since the discovery of penicillin, many other antibiotics have been discovered or developed. Source - www.bbc.co.uk