Questions

Q:

A wire of copper having length I and area of cross-section A is taken and a current / is flown through it. The power dissipated in the wire is P. If we take an aluminium wire having same dimensions and pass the same current through it, the power dissipated will be

A) P B) < P
C) > P D) 2P
 
Answer & Explanation Answer: C) > P

Explanation:

Aluminum has a resistivity varying from 2.65 to 2.82 × 10−8 Ω m.The resistivity of copper is generally given as: 1.72 x 10-8 Ω.m.So, since resistivity of aluminium is higher than that of copper, so Power dissipated will be greater than P. this is because rest of the factors (l, A and i) are constant.

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Filed Under: Physics
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Q:

Capital of Belarus -

A) Praia B) Minsk
C) Cairo D) Vienna
 
Answer & Explanation Answer: B) Minsk

Explanation:

Belarus is a European country whose capital city is Minsk.

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Q:

First country to appoint Lokpal or equivalent to a Lokpal is ________.

A) Brazil B) Burma
C) Sweden D) India
 
Answer & Explanation Answer: C) Sweden

Explanation:
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Q:

Which subatomic particle has no charge?

A) electron B) neutron
C) proton D) All of the above
 
Answer & Explanation Answer: B) neutron

Explanation:

An atom is composed of three subatomic particles. They are ::

 

1) Electron (-vely charged particle)

2) Proton (+vely charged particle)

3) Neutron (No charge particle)

 

Hence, Neutron is the subatomic particle which has no charge.

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Q:

Which material provides warmth even when wet?

A) Cotton B) Wool
C) Nylon D) Silk
 
Answer & Explanation Answer: B) Wool

Explanation:
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Q:

Which is the first Sanskrit film produced in India

Answer

Adi Sankara

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Subject: Indian Culture

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Q:

Which of the following is an example of chemical weathering?

A) Oxidation B) Acid rains
C) Carbonation D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:

Chemical weathering is what happens when rocks are broken down and chemically altered.

Chemical weathering is the breakdown of rocks by chemical reactions. Chemical weathering involves changes in the chemical composition of the existing rock to form new rock. Some examples of chemical weathering are hydrolysis, oxidation, carbonation, dissolution, etc.

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Filed Under: Chemistry
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Q:

Self pollination will lead to

A) Inbreeding B) Over breeding
C) Outbreeding D) Rare breeding
 
Answer & Explanation Answer: A) Inbreeding

Explanation:

Self pollination occurs in the flowers when the pollen grains of the flower falls on the stigma of the same due to wind or insects like moths and bees. This lead to the inbreeding.

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Filed Under: Biology
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