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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
Exam Prep: Bank Exams

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Q:

The organs protected by the thoracic cage include the

A) lungs B) heart
C) both a & b D) None of the above
 
Answer & Explanation Answer: C) both a & b

Explanation:

The organs protected by the thoracic cage include the lungs and the heart.

The_organs_protected_by_the_thoracic_cage_include_the1563453679.jpg image

 

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Filed Under: Biology
Exam Prep: AIEEE , Bank Exams
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7 3054
Q:

"International Day for Disaster Reduction" was observed across the world on _____ ?

A) 16 October B) 15 October
C) 14 October D) 13 October
 
Answer & Explanation Answer: D) 13 October

Explanation:

International Day for Disaster Reduction, held every 13 October, celebrates how people and communities around the world are reducing their exposure to disasters.

The year 2017 focus is : Reducing the number of affected people by disasters by 2030.

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Filed Under: Important Days and Years
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7 3053
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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3 3052
Q:

Which is the only bird that can rotate its head to 270 degrees?

A) Kiwis B) Owl
C) Peacock D) Pigeon
 
Answer & Explanation Answer: B) Owl

Explanation:

The only bird that can rotate its head to 270 degrees is OWL.

the_only_bird_that_can_rotate_its_head_to_270_degrees1552025348.jpg image

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Filed Under: Animals and Birds
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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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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:

What is the freezing point of water in Celsius?

A) 0 deg C B) 32 deg C
C) -42 deg C D) -32 deg C
 
Answer & Explanation Answer: A) 0 deg C

Explanation:

The freezing point of water and melting point is 0 °C or 32 °F. The temperature may be lower if supercooling occurs.

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Filed Under: Chemistry
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Job Role: Analyst , Bank Clerk

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