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Q:

A copper wire of radius r and length lhas a resistance of R. A second copper wire with radius 2r and length lis taken and the two wires  are  joined  in  a  parallel  combination. The  resultant  resistance   of  the  parallel combination of the two wires will be

A) 5 R B) 5 R/4
C) 4 R/5 D) R/5
 
Answer & Explanation Answer: D) R/5

Explanation:

1st copper wire: R = pl/A = pl/ πr2

2ndcopper wire: R’ = p’l’/A’ = pl/(4 πr2) = R/4

If joined in parallel, (1/Req) = (1/R) + (1/R’)

= 1/R + 4/R1/Req= 5/R

Req= R/5

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Filed Under: Physics
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Q:

The most populous city in the world is  ?

A) Tokyo B) Paris
C) Peking D) London
 
Answer & Explanation Answer: A) Tokyo

Explanation:
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Filed Under: Famous Places
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Q:

What travels around the world and stays in one spot?

A) Slippers B) Walking stick
C) Stamps D) None of the above
 
Answer & Explanation Answer: C) Stamps

Explanation:

Stamps are what travel around the worldstaying in one spot. Slippers and walking stick can also travel around the world but they will not stay at one spot. So they are eliminated.

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Filed Under: Logic Puzzles
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Q:

What will happen if an object is dropped from a height and there is no air resistance?

A) It will fall with a constant speed and acceleration B) Its acceleration will increase
C) Both speed and acceleration will increase D) Its speed will increase
 
Answer & Explanation Answer: D) Its speed will increase

Explanation:
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Filed Under: Physics
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Q:

A battlefield always has:

A) Elephants B) Soldiers
C) Arrows D) Chariots
 
Answer & Explanation Answer: C) Arrows

Explanation:
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Filed Under: General Awareness
Exam Prep: Bank Exams

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Q:

All cells divide at the same rate.

A) TRUE B) FALSE
Answer & Explanation Answer: B) FALSE

Explanation:

The given statement that all cells divide at the same rate is FALSE.


 


No, all cells do not divide at the same rate. Cells that require frequent replenishing, such as skin or intestinal cells, may only take roughly twelve hours to complete a cell cycle. Other cells, such as liver cells, remain in a resting state (interphase) for up to a year before undergoing division.

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Subject: Biology
Exam Prep: AIEEE , Bank Exams
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Q:

Which of these phosphorylates ADP to make ATP?

A) E B) B
C) C D) A
 
Answer & Explanation Answer: A) E

Explanation:

The ATP is synthesized from ADP and an inorganic phosphate and involves special channel proteins that are embedded in a membrane. ATP is formed in the electron transport chain of photosynthesis and cellular respiration.

 

which_of_these_phosphorylates_adp_to_make_atp1554270963.jpg image

 

Photosynthesis only occurs in autotrophic organisms while respiration occurs in all types of organisms.

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Filed Under: Biology
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Q:

Stainless steel contains steel and 

A) manganese B) vanadium
C) nickel D) chromium
 
Answer & Explanation Answer: D) chromium

Explanation:

Stainless steel contains 18% chromium and 82% steel

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Filed Under: Chemistry

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