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 11061

Q:

Improve the bracketed part of the sentence.

We are late because my wife took two hours to (put up) her make-up.

A) put on	B) put
C) put over	D) no improvement

Answer & Explanation Answer: A) put on

Explanation:

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Filed Under: English
Exam Prep: Bank Exams

0 11060

Q:

Improve the bracketed part of the sentence.

(Her all) answers were incorrect.

A) All of her	B) Her every answer
C) All in her	D) no improvement

Answer & Explanation Answer: A) All of her

Explanation:

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Filed Under: English
Exam Prep: Bank Exams

0 11050

Q:

Which of the following is a probe to the Kuiper belt bodies?

A) Voyager 1	B) Van Allen Probe
C) New Horizon	D) Pioneer 11

Answer & Explanation Answer: C) New Horizon

Explanation:

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Filed Under: General Science
Exam Prep: Bank Exams

0 11050

Q:

If a carrier wave of 1000 kHz is used to carry the signal, the length of transmitting antenna will be equal to _____ ?

A) 300 m	B) 30 m
C) 3 m	D) 0.3 m

Answer & Explanation Answer: A) 300 m

Explanation:

h = $straight c over straight v$ = 3 × 10⁸/10⁶ = 300 m

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

39 11048

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 11046

Q:

Simla is cooler than Amritsar although they are on the same latitude. This is because

A) Simla is further north	B) Simla is at greater height above sea level than Amritsar
C) Simla is farther from the equator	D) Their longitudes differ

Answer & Explanation Answer: B) Simla is at greater height above sea level than Amritsar

Explanation:

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Filed Under: World Geography

26 11040

Q:

The boundaries of the plates of the earth's ___________ are the weak zones known as seismic or fault zones.

A) crust	B) core
C) kernel	D) pith

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