Q:

In an optical fibre the signal is transmitted

A) in a straight line path	B) In a curved path
C) due to total internal reflection	D) Due to refraction

Answer & Explanation Answer: D) Due to refraction

Explanation:

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Filed Under: Physics

2 1209

Q:

When body is accelerated--

A) Its velocity never changes.	B) Its speed will always change.
C) Its direction always changes.	D) Its speed may or may not change.

Answer & Explanation Answer: D) Its speed may or may not change.

Explanation:

Uniform circular motion, that is constant speed along a circular path, is an example of a body experiencing acceleration resulting in velocity of a constant magnitude but the change of direction

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Exam Prep: Bank Exams

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Q:

Find the power of a convex lens if the image formed is at a distance of 25 cm from the lens when the object is placed on the other side of the lens at 12 cm from the optical centre?

A) -4.33 diopters	B) 12.33 diopters
C) -12.33 diopters	D) 4.33 diopters

Answer & Explanation Answer: B) 12.33 diopters

Explanation:

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Q:

__________ is the interaction in which one species benefits and the other is neither harmed nor benefited.

A) Predation	B) Commensalism
C) Competition	D) Parasitism

Answer & Explanation Answer: B) Commensalism

Explanation:

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Filed Under: General Science
Exam Prep: Bank Exams

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Q:

The commonly used thermometric substance is _____.

A) mineral oil	B) Alcohol
C) Mercury	D) Petrol

Answer & Explanation Answer: C) Mercury

Explanation:

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Filed Under: General Science
Exam Prep: Bank Exams

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Q:

Which is the highest award for gallantry during peacetime?

A) Vir Chakra	B) Param Vir Chakra
C) Ashok Chakra	D) Mahavir Chakra

Answer & Explanation Answer: C) Ashok Chakra

Explanation:

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Filed Under: Honours and Awards

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Q:

If $r \sin θ = \sqrt{3}$ and $r \cos θ = 1$ , then the values of r and $θ$ are: $(0 ° ⩽ θ \leq 90 °)$

A) r=1, θ=30°	B) r=1⁄2, θ=30°
C) r=3 , θ=30°	D) r=2, θ=60°

Answer & Explanation Answer: D) r=2, θ=60°

Explanation:

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Filed Under: Quantitative Aptitude - Arithmetic Ability

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Q:

If $x = \frac{2 + \sqrt{3}}{2 - \sqrt{3}}$ , then what is the value of x+1/x ?

A) 14	B) 8
C) 0	D) 1

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