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AIIMS (All India Institute of Medical Sciences) Physics: Questions 320 - 324 of 500

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Question 320

Question MCQ▾

As in figure below shows plates of same size but of two different materials A and B are connected end to end in thermal contact. The open end of A is kept at and open end of B is kept at . The ratio of thermal conductivity of A and B is given as .

Two Plates of Different Materials at Different Temperature

The steady – state temperature of the interface is -

Choices

Choice (4)Response

a.

b.

c.

d.

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Question 321

Question MCQ▾

The current passing through a choke coil of 9 H is decreasing at the rate of . The emf developing across the coil is –

Choices

Choice (4)Response

a.

-27 V

b.

– 3.0 V

c.

27 V

d.

3 V

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Question 322

Question MCQ▾

The reactance of an inductance of 0.05H for 100 Hz A. C. is –

Choices

Choice (4)Response

a.

62.8 Ω

b.

31.4 Ω

c.

3.14 Ω

d.

6.28 Ω

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Question 323

Question MCQ▾

If a spring balance reads 15 kg when a bucket of water is suspended from it, then what will be the reading of the spring balance when a steel piece of 12 kg suspended from another spring is immersed with half its volume inside water in the bucket?

(Density of the steel is )

Choices

Choice (4)Response

a.

b.

c.

d.

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Question 324

Appeared in Year: 2003

Question Assertion-Reason▾

Assertion(Ꭺ)

Owls can move freely during night

Reason(Ꭱ)

They have large number of rods on their retina

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are false

c.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

d.

Ꭺ is false but Ꭱ is true

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