# Wave length corresponding to the maximum energy is inversely proportional to the absolute temperature. Above statement is

1.  Weans law

2.  Stefan’s law

3.  Kirchhoff’s law

4.  Planck’s law

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Planck’s law

Explanation :
No Explanation available for this question

# Planck’s law of radiation is applicable to

4.  None of these

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Explanation :
No Explanation available for this question

# Heat transfer coefficient for free convection in gases, forced convection in gases and vapours and for boiling water lie, respectively in the ranges of

1.  5-15, 20-200 and 3000-50000 W/m2 K

2.  20-50, 200-500 and 50000-105 W/m2 K

3.  50-100, 500-1000 and 105-106 W/m2 K

4.  20-100, 200-1000 and a constant 106 W/m2 K

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5-15, 20-200 and 3000-50000 W/m2 K

Explanation :
No Explanation available for this question

# In a pulverised-fuel-fired large power boiler, the heat transfer from the burning fuel to the Walla of the furnace is

1.  By conduction only

2.  By convection only

3.  By conduction and convection

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Explanation :
No Explanation available for this question

# Two new scales of temperature, called scale P and scale Q are so chosen that thermometers calibrated to these scales both read 1000 at the temperature of melting ice.A change of 10 degrees on scale P represents the same change in temperature as a change of 20degrees on scale Q, it follows that

1.  00 on scale P corresponds to 00 on scale Q

2.  500 on scale P corresponds to 00 on scale Q

3.  500 on scale P corresponds to -1000 on scale Q

4.  1000 Celsius corresponds to 2000 on scale P

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500 on scale P corresponds to 00 on scale Q

Explanation :
No Explanation available for this question

# Temperature near absolute zero are obtained using

1.  Pettier effect

2.  Thermionic effect

3.  Zoetrope’s

4.  Magnetic cooling

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Magnetic cooling

Explanation :
No Explanation available for this question

# The specific heat of concentrated orange juice is 5.8kilo-joules per kg0c. How much heat must be removed to cool 3.0 kilograms of juice from 300C to 00C

1.  24kJ

2.  38kJ

3.  340kJ

4.  600kJ

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340kJ

Explanation :
No Explanation available for this question

# The process of heat transfer from one particle of the body to another by the actual motion of the heated particle, is known as

1.  Conduction

2.  Convection

4.  All of these

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Convection

Explanation :
No Explanation available for this question

# Heat is transferred from an electric bulb by

1.  Conduction

2.  Convection

4.  All of these

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Explanation :
No Explanation available for this question

1.  Conduction

2.  Convection

4.  All of these

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