- Thermal resistance
- Thermal coefficient
- Temperature gradient
- Thermal conductivity
1 Answers
Call
Answer: Option 4
A measure of the ability of a material to transfer heat. Given two surfaceson either side of the material with a temperature difference between them,the thermal conductivity is the heat energy transferred per unit time andper unit surface area, divided by the temperature difference. It is measured in watts per degree Kelvin.
0
like
0 dislike
Talk Doctor Online in Bissoy App
What is the colour of the fresh grass Statements : I. Blue is called green, red is called orange, orange is called yellow. II. Yellow is called white, white is called black, green is called brown and brown is called purple.?
Answer: Option 2 The colour of fresh grass is 'green' and as given in II, 'green' is called 'brown'. So, the colour of fresh grass is 'brown'.
1 Answers 1 views
If Dust is called Air, Air is called Fire, Fire is called Water, Water is called Colour, Colour is called Rain and Rain is called Dust, where do Fish live ?
Answer: Option 3 Generally, Fishes lives in Water and Water is called Colour in the code. So Fishes live in Colour.
1 Answers 1 views
Directions : In each of the following questions a statement is given, followed by two conclusions. Give answer : Statements : Jade plant has thick leaves and it requires little water. Conclusions : I. All plants with thick leaves require little water. II. Jade plants may be grown in places where water is not in abundance.?
Answer: Option 2 The statement talks of jade plants only and not 'all plants with thick leaves'. So, I does not follow. Also, since jade plants require little water, so...
1 Answers 1 views
The heat transfer by conduction through a thick cylinder (Q) is given by (where T₁ = Higher temperature, T₂ = Lower temperature, r₁ = Inside radius, r₂ = Outside radius, l = Length of cylinder, and k = Thermal conductivity)?
Answer: Option 1 The heat transfer by conduction through a thick cylinder (Q) is given by Q = [2πlk (T₁ - T₂)]/2.3 log (r₂/r₁)where T₁ = Higher temperature, T₂ =...
1 Answers 1 views
Fourier's law of heat conduction is (where Q = Amount of heat flow through the body in unit time, A = Surface area of heat flow, taken at right angles to the direction of heat flow, dT = Temperature difference on the two faces of the body, dx = Thickness of the body, through which the heat flows, taken along the direction of heat flow, and k = Thermal conductivity of the body)?
Answer: Option 1 Fourier's law of heat conduction is k. A. (dT/dx) where Q = Amount of heat flow through the body in unit time, A = Surface area of heat...
1 Answers 1 views
The C.O.P. of an absorption type refrigerator is given by (where T₁ = Temperature at which the working substance receives heat, T₂ = Temperature of cooling water, and T₃ = Evaporator temperature)?
Answer: Option 2 The C.O.P. of an absorption type refrigerator is given by [T₃ (T₁ - T₂)]/ [T₁ (T₂ - T₃)] (where T₁ = Temperature at which the working substance...
1 Answers 1 views
For small temperature difference, the heat transfer rate as per Newton's law of cooling is proportional to (where, Δt = excess temperature)?
Answer: Option 1 Let'
1 Answers 1 views
If Football is called Cricket, Cricket is called Basketball, Basketball is called Badminton, Badminton is called Volleyball, Volleyball is called Hockey and Hockey is called Golf, then which of the following games is not played using a ball?
Answer: Option 1 Badminton is played without any ball and in the question Badminton is called Volleyball.
1 Answers 2 views
Statement : The air and rail services have been severely disrupted due to thick fog in the northern part of the country. Courses of Action : I. The rail and air services should be temporarily suspended in the region. II. People should be advised to make their travel plan keeping in mind the probable disruption resulting in delay or cancellation of services. III. The government should immediately install modern machines which will enable it to guide the rail and air services even if the thick fog develops.?
Answer: Option 4 Keeping in mind the safety and convenience of passengers, both I and II follow. III clearly suggests a remedy to the problem and hence it also follows.
1 Answers 1 views