Heat and Thermodynamics
| Description: Dual Nature of Matter and Radiation | |
| Number of Questions: 30 | |
| Created by: | |
| Tags: Dual Nature of Matter and Radiation Heat Thermal Properties of Matter Elementary Concepts of Convection and Radiation Radiation Newton-s Law of Cooling Black Body Radiation Absorptive and Emissive Powers |
A hot body will radiate heat most rapidly if its surface is
Two thin blankets are warmer than a single blanket of same thickness as the two because
The quantity of heat which crosses unit area of a metal plate during conduction depends upon
If a body is slowly heated, first it will become
Metals are good conductors of heat because
In which case does the conductivity increase from left to right?
The thermal conductivity of a rod depends on its
Heat is transmitted from higher to lower temperature through actual mass motion of the molecules in
In a thermos flask, attempt is made to reduce losses by
Newton's law of cooling is applicable to
An object is hotter for the same distance over the top of the fire than it is in the side of it mainly because
Good absorbers of heat are
The radiation emitted by a perfect black body is proportional to
In winter, the temperature of the inside wall of a house, as compared to the temperature of air in the room,
Substances through which radiant heat can pass are called
In a workshop where chlorine accumulates, the ventilator should be installed _________.
The spectrum from a black body radiation is called _________.
Ice formed over lake
A piece of ice placed in a room
Ice is placed in the upper part of an ice chest because
Heating effect of the incoming solar radiation is maximum at local noon because the
Electromagnetic radiation is emitted
The speediest mode of heat transfer is
As compared to a person with a white skin, a person with dark skin experiences
Which of the following statements is true?
Human breathing at a place
The energy radiated per second by a spherical black body will be double, if its
For proper ventilation of a building, windows must be open near the bottom & the top of the walls so as to let pass
Which one of the following statements concerning a vacuum flask is correct?
Which of the following statements is wrong?