GTU IMP MCQ Material With Mock Test Material For Physics Chapter Heat transfer, GTU MCQ Quiz Solution Or Book Material One-Click Download Now
Applied Physics Chapter Heat transfer (Q&A)
1. Heat can travel from one end to another in a copper rod due to__________
Answer: heat conduction
2. Unit of heat capacity is__________
Answer: Joule per kelvin (j/°c)
3. Heat transfer in liquid and gases takes place by ____________
Answer: heat convection
4. The temperature difference between two ends of 50cm long rod is 100 0C. The temperature gradient will be__________
Answer: 2°C/cm
5. In Fahrenheit scale water freezes at
Answer: 32°
6.When heat is given to the boiling water , the temperature of the water__________
Answer: increases
7. Quantity of heat produced by a conductor is directly proportional to ________in the conductor.
Answer: the resistance
8.100° C temperature = __________ Fahrenheit
Answer: 212
Formula: (100°C × 9/5) + 32 = 212°F
9.By which of the following ways energy of sun reaches to earth?
Answer: radiation
10. Temperature difference of two ends of 100cm long metal rod is 200°C temperature gradient becomes______
Answer: 2°C/cm
11.A good absorber of radiation is a
Answer: Good emitter of radiation
12.When heat is given to 100°C boiling water, the temp of water
Answer: Stays the same
13.Energy emitted by black body is proportional to ________. Where T is absolute temperature.
Answer:T⁴
14.Temperature of boiling water is ______°F.
Answer: 212
15.Which of the following metal is having more thermal conductivity___________
Answer: copper
More metal thermal conductivity :
Copper> Aluminum >Brass > Steel > Bronze
223 > 118 > 64 > 17 > 15[ Thermal Conductivity [BTU/(hr·ft⋅°F) ]
16. 101°F = ________°C
Answer: 38.33°c
Formula: 5/9 (101°F − 32) = 38.333°C
17.Which relation is correct ?
Answer:cₚ - cᵥ = R
18. The Planet Earth loses heat mainly by
Answer: conduction
19.Increasing the temp of 50 gms of water by 1°C requires
Answer: Latent heat of fusion
20. A certain amount of heat increases the temperature of 1 gm of material A by 3°c and 1gm of material B by 4°c which material has greater specific heat ?
Answer: material A
21.the measurment of temperature of triple point of water gives ______° C temperature.
Answer: 0.01
22.on the temperature scale of °C and °f Which value of temperature is the same.
Answer: -40
23.heat capacity of a body depends on the _______as well as on ______
Answer: Material of the body, its mass
24.100 g ice at 0°c is placed in 100 g water at 100°c the final temperature of the mixture will be ________( laten heat of melting of ice is 80 cal/g and specific heat of water is 1 cal/g°c)
Answer : -10°c
25. The value of absolute zero temperature on a Fahrenheit scale is taken as ________ °F
Answer: -459.67
26.for which value of the temperature will the values scale and Kelvin scale be equal ?
Answer: 574.8
27. Given the relation between Celsius scale and Fahrenheit scale
Answer: 9/5 • t𝒸 + 32
28 Give relation between Celsius and Kelvin scale
Answer: t = T - 273.15
29. is a process by which thermal energy is transferred between solid and fluid flowing through it.
Answer: convection
30. Thermal conductivity of wood depends on.
Answer: Moisture ,Density, Temperature , All of the above
31. Sun emits 6.3 × 10⁷ J heat energy per second from 1m² area. Calculate its temperature on surface.
Answer: T = 5773 K
32. An object is at 1000K. It's surface area is 10 cm². It emits heat energy 340.2 j/minute, calculate its emissivity.
Answer: e = 0.1
33. The amount of heat required to change the temperature of one mole of a gas by 1 K (1° C) is called ________.
Answer: Molar specific heat
34. The amount of heat required to change the temperature of one mole of a gas by 1 K, keeping its volume constant is called ________.
Answer: Specific heat a constant volume (Cᵥ)
35. The amount of heat required to change the temperature of one mole of a gas by 1 K, keeping its pressure constant is called ________.
Answer: Specific heat a constant pressure (Cₚ)
36. The quantity of heat required per unit change in temperature of a body is called _________.
Answer: Specific heat
37. The ratio of heat Q supplied to a body to a change in it's temperature △T is called _________.
Answer: Heat capacity
38. On irradiating a surface, the ratio of the radiant energy absorbed to the amount of rediant energy incident on the surface is called __________.
Answer: Absorptivity
39. The ratio of the total emissive power of a surface to the total emissive power of surface of a perfectly black body kept under the same conditions is called _______.
Answer: Emissivity
40. "The values of emissivity and absorptivity are equal for any surface."
Answer: Statement of Kirchhoff's law.
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