Questions

Q:

A parallel-plate capacitor of capacitance C1is  made  using  two  gold  plates.  Another parallel-plate capacitor of capacitance C2is made  using  two  aluminium  plates  with same  plate  separation,  and  all  the  four plates  are  of  same  area.  If gand aPare respectively  the  electrical  resistivities  of gold and aluminium, then which one of the following relations is correct?

A) C1>C2 B) C2>C1
C) C1pa = C2pg D) C1 = C2
 
Answer & Explanation Answer: D) C1 = C2

Explanation:

C1= capacitance of gold plates

C2=   capacitance   of   aluminium plates

rg= Gold’s resistivity

ra= Aluminium’s resistivity

As the capacitance depends on the shape,  size  &  geometrical  placing of  the  conductors  &  the  medium between them, hence, the value of capacitance  will  be  independent  of resistivity. Therefore, C1= C2

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Filed Under: Physics
Exam Prep: Bank Exams

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Q:

Which of the following mixtures is not a colloid?

A) Sugar water B) Milk
C) Paint D) Fog
 
Answer & Explanation Answer: A) Sugar water

Explanation:

Colloids include gels, sols, and emulsions; the particles do not settle, and cannot be separated out by ordinary filtering or centrifuging like those in a suspension.

These Colloid substances consists of ultramicroscopic particles of one substance dispersed through another substance from which we cannot separate them.

 

Sugar water is not a colloid and it is a solution in which we can separate them.

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Filed Under: Chemistry
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Q:

Lipids are insoluble in water because lipids are

A) Hydrophobic B) Zwitter ions
C) Hydrophylic D) Neutral
 
Answer & Explanation Answer: A) Hydrophobic

Explanation:

Lipids are soluble in solvents of low polarity, which simply means that lipids are soluble in nonpolar solvents. This solubility property is a result of the large nonpolar regions that are indicative of the lipid molecule.

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Filed Under: General Science
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Q:

The study of Brain is called as

A) Neurology B) Nephrology
C) Phrenology D) Neurobiology
 
Answer & Explanation Answer: C) Phrenology

Explanation:

The study of Brain is called as Phrenology

 

Neurology is a branch of medicine dealing with disorders of the nervous system.

Nephrology is the study of kidney.

Neurobiology or Neuroscience is the study of the nervous system

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Filed Under: General Science
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Q:

How many non regional members are there in the African development Bank

A) 24 B) 23
C) 25 D) 27
 
Answer & Explanation Answer: C) 25

Explanation:
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Filed Under: World Organisations

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Q:

What does destination scan mean?

A) The shipment has arrived at a UPS facility. B) The shipment has departed a UPS facility and is on its way to the next UPS facility.
C) The shipment has arrived at the local UPS facility responsible for final delivery. D) UPS has received the shipment.
 
Answer & Explanation Answer: C) The shipment has arrived at the local UPS facility responsible for final delivery.

Explanation:

Shipment movement information is captured each time a tracking label is scanned in the UPS delivery system. There may be several days between scans if the shipment is going cross-country or moving between countries.

 

Destination Scan: The shipment has arrived at the local UPS facility responsible for final delivery.

Arrival Scan: The shipment has arrived at a UPS facility.

Departure Scan: The shipment has departed a UPS facility and is on its way to the next UPS facility.

Origin Scan: UPS has received the shipment.

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Filed Under: Marketing and Sales

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Q:

What type of macromolecule is DNA?

A) Proteins B) Carbohydrates
C) Nucleic acids D) All of the above
 
Answer & Explanation Answer: C) Nucleic acids

Explanation:

DNA stands for Deoxyribo nucleic acid. It is a nucleic acid made up of monomeric unit called Nucleotide.

A nucleotide consist of -

a) Sugar - Deoxyribose in DNA ( ribose in RNA)

b) An organic base- Adenine, cytosine, guanine.

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Filed Under: General Science
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Q:

Which is the largest coal producing country in the World?

A) India B) China
C) Russia D) New-zealand
 
Answer & Explanation Answer: B) China

Explanation:

China has been by far the biggest coal producing country over the last three decades. The country produced about 3.6 billion tonnes (Bt) of coal in 2012 accounting for over 47% of the world's total coal output.

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