Questions

Q:

In spherical polar coordinates (l, q, a), q denotesthe polar angle around z-axis and a denotes the azimuthal angle raised from x-axis . Then the y-component of P is given by

A) Psinq sina B) Psinq cosa
C) Pcosq sina D) Pcosq cosa
 
Answer & Explanation Answer: A) Psinq sina

Explanation:

The Cartesian Coordinates can be retrieved from spherical coordinates (l,q,a) by:

X = r.sinq.cosa

Y = r.sinq.sina

Z = r.sinq

Using the same we get for P,

Y = P.sinq.sina

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Filed Under: Physics
Exam Prep: Bank Exams

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Q:

Which is a compound that contains carbon?

A) Ethane B) Propane
C) Methane D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

The compound methane is a simple hydrocarbon contains one carbon bonded to four hydrogens. Ethane is a simple hydrocarbon which contains two carbon atoms and four hydrogen atoms. Similarly, propane with three carbons.

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Filed Under: Chemistry
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Q:

Which one of the following elements does not form solid hydrogen carbonate?

A) Sodium B) Potassium
C) Caesium D) Lithium
 
Answer & Explanation Answer: D) Lithium

Explanation:

Potassium bicarbonate (also known as potassium hydrogen carbonate or potassium acid carbonate) is the inorganic compound with the chemical formula KHCO3. It is a white solid

Sodium bicarbonate is a white solid that is crystalline, but often appears as a fine powder.

LiHCO3 is found in solution form while rest alkali metals hydrogen carbonates are solid due to the anomalous properties of Li and its diagonal relationship with the Mg.

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Filed Under: Chemistry
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Q:

In the following question, a sentence has been given in Direct/Indirect speech. Out of the four alternatives suggested, select the one which best
expresses the same sentence in Indirect/Direct speech.
They said, “We pray everyday.”

A) They said that they have been praying every day. B) They said that they pray every day.
C) They said that they prayed every day. D) They said that we prayed every day.
 
Answer & Explanation Answer: C) They said that they prayed every day.

Explanation:
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Filed Under: English

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Q:

Improve the bracketed part of the sentence.

Taj Mahal is (a worth seeing monument) in Agra.

A) a monument to see its worth B) a monument worth seeing
C) one of worth seeing monuments D) No improvement
 
Answer & Explanation Answer: B) a monument worth seeing

Explanation:
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Filed Under: English
Exam Prep: TOEFL , GRE , CAT

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Q:

Which state introduces a new Open Online Learning Programme 'KOOL'?

A) Kerala B) Telangana
C) Uttar Pradesh D) Tamil Nadu
 
Answer & Explanation Answer: A) Kerala

Explanation:

The Kerala Infrastructure and Technology for Education (KITE) is the platform that can be used to train teachers, students and the general public. KOOL is a major step by the State of Kerala to become Indias first complete digital state in Education.

 

KOOL has been designed in a MOOC (Massive Open Online Course model), which is becoming popular worldwide.

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Filed Under: Indian Geography
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Q:

What is the resistance (in ohm) of an electrical component if a current of 0.1 A passes through it on application of 5 V of potential difference across it?

A) 0.5 B) 100
C) 50 D) 1
 
Answer & Explanation Answer: C) 50

Explanation:
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Filed Under: Physics
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Q:

Lens is made up of

A) Pyrex glass B) Flint glass
C) Ordinary glass D) Cobalt glass
 
Answer & Explanation Answer: B) Flint glass

Explanation:

Lens is made up of Flint glass.

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Filed Under: General Science
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