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Q:

A disk and a sphere of same radius but different masses roll on two inclined planes of the same altitude and length. Which one of the two objects gets to the bottom of the plane first ?

A) Depends on their masses	B) Sphere
C) Disk	D) Both reach at the same time

Answer & Explanation Answer: B) Sphere

Explanation:

Time does not depend on mass, else

$T \infty \sqrt{(1 + \frac{k^{2}}{R^{2}})}$

$\frac{k^{2}}{R^{2}}$ => is least for 'sphere' and

hence least time is taken by sphere.

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Filed Under: Physics
Exam Prep: AIEEE

Q:

Which country successfully launched the first high-throughput communication satellite "Shijian-13" which will enable passengers of high-speed trains to watch high-definition videos smoothly and help those at the scene of natural disasters ?

A) Japan	B) China
C) Singapore	D) Indonesia

Answer & Explanation Answer: B) China

Explanation:

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Filed Under: General Awareness
Exam Prep: Bank Exams , CAT
Job Role: Bank Clerk

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

Q:

Which one of the following can be oxidised to the corresponding carbonyl compound:

A) 2-methyl-2-hydroxy propane	B) 2-hydroxy propane
C) o-Nitrophenol	D) Phenol

Answer & Explanation Answer: B) 2-hydroxy propane

Explanation:

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Filed Under: Chemistry
Exam Prep: AIEEE

Q:

What is the maximum velocity with which a body of mass 'm' must enter a vertical loop of radius 'R'so that it can complete the loop?

A) 0 B) gR C) $\sqrt{2} g R$ D) $\sqrt{5 g R}$

A) A	B) B
C) C	D) D

Answer & Explanation Answer: D) D

Explanation:

To complete the vertical loop, the minimum speed required at the lowest point = $\sqrt{5 g R}$ .

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Filed Under: Physics
Exam Prep: AIEEE , GATE
Job Role: Analyst

Q:

Variable number of tandem repeats (VNTRs) in the DNA molecule are highly useful in

A) Recombinant DNA technology	B) Monoclonal antibody production
C) Stemcell culture	D) DNA fingerprinting

Answer & Explanation Answer: D) DNA fingerprinting

Explanation:

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Filed Under: Biology
Exam Prep: AIEEE

Q:

In which of the following mammals estrous cycle is absent ?

A) Rabbit	B) Horse
C) Cow	D) Monkey

Answer & Explanation Answer: D) Monkey

Explanation:

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Filed Under: Biology
Exam Prep: AIEEE , Bank Exams

Q:

What was the name of India's first ever micro-drama festival that was held recently in New Delhi ?

A) Thanes Hare	B) Taapsi
C) Thespis	D) Ankulrama

Answer & Explanation Answer: C) Thespis

Explanation:

India's first ever micro-drama festival, named Thespis, was held recently in New Delhi.

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Filed Under: General Awareness
Exam Prep: Bank Exams

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