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AIIMS (All India Institute of Medical Sciences) Physics: Questions 81 - 85 of 500

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Question 81

Appeared in Year: 2005

Question MCQ▾

What should be the maximum acceptance angle at the air-core interface of an optical fiber if n1 and n2 are the refractive indices of the core and the cladding, respectively – [AIIMS]

Choices

Choice (4)Response

a.

b.

c.

d.

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Question 82

Appeared in Year: 2000

Question MCQ▾

A body is projected at such an angle that the horizontal range is three times the greatest height. The angle of projection is [DPMT]

Choices

Choice (4)Response

a.

25°

b.

42°

c.

33°

d.

53°

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Question 83

Appeared in Year: 2005

Question MCQ▾

The dimensional formula of angular velocity is [JIPMER 1993; AFMC 1996]

Choices

Choice (4)Response

a.

b.

c.

d.

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Question 84

Appeared in Year: 1995

Question MCQ▾

Force between two identical bar magnets whose centers are r meter apart is 4.8 N when their axes are in same line. If separation is increased to 2r, the force between them is reduced to: [AIIMS]

Choices

Choice (4)Response

a.

2.4 N

b.

0.3 N

c.

1.2 N

d.

0.6 N

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Question 85

Question MCQ▾

What happens, when we multiply a vector by (- 2) ?

Choices

Choice (4)Response

a.

Direction remains unchanged and unit changes

b.

Direction reverses and unit changes

c.

Direction reverses and magnitude is doubled

d.

Question does not provide sufficient data or is vague

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