General Knowledge Questions

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 11749
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 11740
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 11739
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 11731
Q:

Reykjavik is the capital of which country?

A) Jamaica B) Jordan
C) Iceland D) Ireland
 
Answer & Explanation Answer: C) Iceland

Explanation:
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Filed Under: Country Capitals

90 11722
Q:

 What is the name of the virus that fool a user into downloading and executing them by pretending to be useful applications  ?

A) Trojan horses B) Keylogger
C) Worm D) File virus
 
Answer & Explanation Answer: A) Trojan horses

Explanation:
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Filed Under: Computer
Exam Prep: Bank Exams , CAT
Job Role: Analyst , IT Trainer

32 11699
Q:

Delayed payload of some viruses is also called as _____

A) Bomb B) Late - Virus
C) Time D) Anti-virus
 
Answer & Explanation Answer: A) Bomb

Explanation:
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Filed Under: Computer
Exam Prep: Bank Exams , CAT
Job Role: Bank Clerk , Bank PO

22 11681
Q:

Cinematography was invented by

A) Graham Bell B) Edison
C) Zeiss D) Faraday
 
Answer & Explanation Answer: B) Edison

Explanation:
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Filed Under: Inventions

20 11668