Questions

Q:

Suppose voltage V is applied across a resistance R. The power dissipated in the resistance is P. Now the same voltage V is applied across a parallel combination of three equal resistors each of resistance R. Then the power dissipated in the second case will be

A) P B) 3P
C) p/3 D) 2p/ 3
 
Answer & Explanation Answer: B) 3P

Explanation:

P= I^2.R where, I= Current, P= Electric Power, R=Resistance. Here all the resistance is put in parallel combination and in parallel combination the value of Resistance decreases and dissipation of power increase, hence 3 times more power will be dissipated(3P).

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Filed Under: Physics
Exam Prep: Bank Exams

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Q:

Molar mass of HNO3?

A) 63 g/mol B) 53 g/mol
C) 48 g/mol D) 52 g/mol
 
Answer & Explanation Answer: A) 63 g/mol

Explanation:

Calculation of molar mass of HNO3:

Atomic masses of H, N, O are 1, 14, 16 respectively

Now the molar mass of HNO3 is

HNO3 = 1X1 + 1X14 + 3X16

= 1 + 14 + 48

= 63 g/mol or amu.

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Q:

What occurs when an atom loses an electron?

A) The atom's radius decreases and the atom becomes a positive ion. B) The atom's radius increases and the atom becomes a negative ion.
C) The atom's radius decreases and the atom becomes a negative ion. D) The atom's radius increases and the atom becomes a positive ion.
 
Answer & Explanation Answer: A) The atom's radius decreases and the atom becomes a positive ion.

Explanation:

When an atom loses an electron it becomes a positive ion by acquiring negatively charged. When it loses electron, the atom's radius also decreased.

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Q:

In which world cup cricket final, Australia beat England?

A) 1987, Kolkata - India B) 1996, Lahore - Pakistan
C) 1983, Lord's - England D) 1992, Melbourne - Australia
 
Answer & Explanation Answer: A) 1987, Kolkata - India

Explanation:

Australia won the 1987/88 Reliance World Cup against England held in Kolkata, India.

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Q:

I am a protector. I sit on a bridge. One person can see right through me while others wonder what I hide. What am I?

Answer

The Sunglasses. 


It protects us from the sunlight and it sits on the bridge means hangs on our ears and nose. Only who keeps that can see through it and others wonder what he is watching.

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Q:

Indians who have been featured on Forbe's list of the 100 Greatest Living Business Minds ?

A) Ratan Tata B) Lakshmi Mittal
C) Vinod Khosla D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

Three Indians – Ratan Tata, Lakshmi Mittal and Vinod Khosla have been featured on Forbe's list of the 100 Greatest Living Business Minds.

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Q:

Differentiate between Complier and Interpreter?

Answer

An interpreter reads one instruction at a time and carries out the actions implied by that instruction. It does not perform any translation. But a compiler translates the entire instructions

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Q:

Which line is an example of the poetic technique metonymy?

A) I’m martyr to a motion not my own B) These old bones live to learn her wanton ways
C) Let seed be grass, and grass turn into hay D) I swear she cast a shadow white as stone
 
Answer & Explanation Answer: B) These old bones live to learn her wanton ways

Explanation:

Metonymy is a figure of speech in which a thing or concept is referred to by the name of something closely associated with that thing or concept. Hence it occurs when a word is replaced by a word that has an obvious relation to itself.

 

In the given example of the text, the bones refer to the human being.

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