Sawaal

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Q:

A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 50 cm and 10 cm from the positive end of the wire in the two cases. The ratio of the emf's is :

A) 3:4 B) 5:4
C) 5:1 D) 3:2
 
Answer & Explanation Answer: D) 3:2

Explanation:

In series : E1 + E2 = K(50)

In parallel : E1 - E2 = K(10)

E1 + E2 / E1 - E2 = 5/1

=> E1/E2 = 3/2

The emf's are in the ratio of 3:2.

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Filed Under: Physics
Exam Prep: AIEEE

40 11772
Q:

The H.C.F. of two numbers is 23 and the other two factors of their L.C.M. are 13 and 14. The larger of the two numbers is:

A) 276 B) 299
C) 322 D) 345
 
Answer & Explanation Answer: C) 322

Explanation:

Clearly, the numbers are (23 x 13) and (23 x 14).

 

 

 

 Larger number = (23 x 14) = 322.

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Filed Under: Quantitative Aptitude - Arithmetic Ability

12 11766
Q:

How do you go about familiarizing yourself with the products you sell?

Answer

Retail products often change seasonally.  Can you quickly update yourself on all the new information so you can be prepared to sell the new inventory to customers as soon as it lands on the shelf


 

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Subject: Retail

11 11756
Q:

Due to an acceleration of 1  m/s2, the velocity of a body increases from 5 m/s to 10 m/s in a certain period. Find the displacement (in m) of the body in  that period.

 

A) 125 B) 37.5
C) 62.5 D) 75
 
Answer & Explanation Answer: B) 37.5

Explanation:
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Filed Under: Physics
Exam Prep: Bank Exams

9 11754
Q:

Total internal reflection can take place when light travels from

A) Air to glass B) Air to water
C) Water to glass D) Diamond to glass
 
Answer & Explanation Answer: D) Diamond to glass

Explanation:
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Filed Under: Physics

39 11753
Q:

Light from the sun reaches us in nearly

A) 5 min B) 4.30 hrs
C) 8 min D) 5.30 hrs
 
Answer & Explanation Answer: C) 8 min

Explanation:

The light from the sun takes about 8 minutes to reach the Earth after it has been emitted from the sun's surface.

 

The time it takes for light to reach planets in our Solar System varies from about 3 minutes for Mercury to about 5.3 hours for Pluto.

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Filed Under: Physics
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Analyst , Bank Clerk , Bank PO

20 11744
Q:

The famous battle of Takkolam of South India was fought between _______

A) Cholas and North Chalukyas B) Cholas and Rashtrakutas
C) Cholas and Hoyasals D) Cholas and Pandyas
 
Answer & Explanation Answer: B) Cholas and Rashtrakutas

Explanation:
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Filed Under: Indian History

17 11741
Q:

The metal which reacts most violently with with cold water is

A) calcium B) sodium
C) magnesium D) potassium
 
Answer & Explanation Answer: D) potassium

Explanation:

Potassium reacts violently with water liberating hydrogen. The reaction is so violent that the liberated hydrogen catches fire.

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Filed Under: Chemistry

47 11740