Embibe Experts Solutions for Chapter: Heat Transfer, Exercise 3: Exercise-3

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Embibe Experts Physics Solutions for Exercise - Embibe Experts Solutions for Chapter: Heat Transfer, Exercise 3: Exercise-3

Attempt the practice questions on Chapter 16: Heat Transfer, Exercise 3: Exercise-3 with hints and solutions to strengthen your understanding. Alpha Question Bank for Medical: Physics solutions are prepared by Experienced Embibe Experts.

Questions from Embibe Experts Solutions for Chapter: Heat Transfer, Exercise 3: Exercise-3 with Hints & Solutions

EASY
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IMPORTANT

The two ends of a metal rod are maintained at temperatures 100°C and 110°C. The rate of heat flow in the rod is found to be 4.0 J s-1. If the ends are maintained at temperatures 200°C and 210°C, the rate of heat flow will be:

MEDIUM
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IMPORTANT

A body cools from a temperature 3T to 2T in 10 minutes. The room temperature is T. Assume that Newton's law of cooling is applicable. The temperature of the body at the end of the next 10 minutes will be

MEDIUM
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IMPORTANT

Two rods A and B of different materials are welded together as shown in the figure. Their thermal conductivities are K1 and K2. The thermal conductivity of the composite rod will be

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EASY
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IMPORTANT

1 kcal of heat flowing through a rod of iron per second. When the rod is cut down to 4 pieces then what will be the heat flowing through each piece per second having the same differential temperature (temperature gradient)?

EASY
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Black holes in orbit around a normal star are detected from the earth due to the frictional heating of infalling gas into the black hole, which can reach temperatures greater than 106 K. Assuming that the infalling gas can be modelled as a blackbody radiator then the wavelength of maximum power lies

MEDIUM
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IMPORTANT

Two conductors having the same width and length, thickness d1 and d2 thermal conductivity K1 and K2 are placed one above the other. Find the equivalent thermal conductivity.

EASY
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A long metallic bar is carrying heat from one of its ends to the other end under steady-state. The variation of temperature θ along the length x of the bar from its hot end is best described by which of the following figures?

MEDIUM
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IMPORTANT

The temperature difference of 120 °C is maintained between two ends of a uniform rod AB of length 2L. Another bent rod PQ, of the same cross-section as AB and length 3L2, is connected across AB (see figure). In steady-state, the temperature difference between P and Q will be close to

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