1. Convection is a mode of heat transfer by actual motion of matter. II. Convection is possible ...

Channel:
PW Solutions
Subscribers:
449,000
Published on ● Video Link: https://www.youtube.com/watch?v=8Sfc8u5hcm0


Duration: 3:42
0 views
0

1. Convection is a mode of heat transfer by actual motion of matter.
II. Convection is possible only in gases.
III. Convection can be natural or forced.
Which of the following statement(s) is/are correct?
(a) Only I
(b) Both I and III
(c) Only II
(d) I, II and III
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live



Other Videos By PW Solutions


2022-11-07Choose the correct option from the following. (a) Zeroth law gives the concept of temperature. (...
2022-11-07According to Zeroth law, which physical quantity must have same value for the two systems to be ...
2022-11-07If a system is in thermodynamic equilibrium with its surroundings, it means (a) temperature of s...
2022-11-07If two systems are in thermal equilibrium with each other, it means their (a) masses are equal, ...
2022-11-07The graph shows the variation of temperature \( T \) of one kilogram of a material with the heat...
2022-11-07According to initial theory, the heat was considered as fluid called 'caloric'. This caloric (a)...
2022-11-07I. Conduction of heat takes places in solids and liquids like mercury and molten metals. II. In ...
2022-11-071. Gases are poor thermal conductors. II. Liquids have conductivities intermediate between solid...
2022-11-07A body \( A \) is at a temperature \( T_{A} \) and a body \( B \) is at a temperature \( T_{B} \...
2022-11-07Which one of the following statement is correct for dependance of the coefficient of linear expa...
2022-11-071. Convection is a mode of heat transfer by actual motion of matter. II. Convection is possible ...
2022-11-07Assertion \( \mathrm{NH}_{3} \) is liquified more easily than \( \mathrm{CO}_{2} \). Reason Crit...
2022-11-07Assertion A black body at higher temperature \( T \) radiates energy \( U \). When temperature f...
2022-11-07Assertion The rate of loss of heat of a body at \( 300 \mathrm{~K} \) is \( R \). At \( 900 \mat...
2022-11-07Assertion For higher temperatures, the peak emission wavelength of a black body shifts to lower ...
2022-11-07Assertion The radiation from the sun's surface varies as the fourth power of its absolute temper...
2022-11-07Assertion Desert regions are hotter in day and colder at night. Reason Desert sand is dry.
2022-11-07Assertion When temperature difference across the two sides of a wall is increased, its thermal c...
2022-11-07Assertion The SI unit of Stefan's constant is \( \mathrm{Wm}^{-2} \mathrm{~K}^{-4} \). Reason Th...
2022-11-07Assertion Water kept in an open vessel will quickly evaporate on the surface of the moon. Reason...
2022-11-07Assertion If equal amount of heat is added to equal masses of different substances, the resultin...


Tags:
pw