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Chapter:

Conduction-with-Heat-Generation

1. Unit of specific resistance is


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2. Generally heat generated depends on some parameters. It is directly proportional to


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3. Notable example of uniform generation of heat within conducting medium are
(i) Energy of a nuclear reactor
(ii) Liberation of energy due to some exormic chemical reactions
(iii) Resistance heating in electrical appliances
Which of statements made above are correct?


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4. Suppose heat is conducted due to electrons
Where, i = I/A and p is resistivity, n


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5. Dielectric heating apparatus consists of


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6. The insulating material used in dielectric heating is


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7. For a plane wall of thickness l with uniformly distributed heat generation q g per unit volume, temperature t 0 at mid plane is given by


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8. Consider a slab of thickness δ with one side (x = 0) insulated and or side (x = δ) maintained at constant temperature. The rate of uniform heat generation within slab is q g W/m3. Presuming that heat conduction is in steady state and one dimensional along x direction, maximum temperature in slab would occur at x equal


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9. A slab of insulating material of thickness 6 cm and rmal conductivity 1.4kJ/m hr deg is placed between and is in contact with two parallel electrodes, and is n subjected to high frequency dielectric heating at a uniform rate of 140,000kJ/m3 hr. At steady state coefficients of combined radiation and convection are 42 and 48 kJ/m2 hr deg. If atmospheric temperature is 25 degree Celsius, find surface temperatures?


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10. Consider a 1.2 m thick slab of poured concrete (k = 1.148 W/m degree) with both of side surfaces maintained at a temperature of 20 degree Celsius. During its curing, chemical energy is released at rate of 80 W/m3. Workout maximum temperature of concrete


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Topics

This Chapter Conduction-with-Heat-Generation consists of the following topics

Conduction with Heat Generation

Unit of specific resistance is

;

Generally heat generated depends on some parameters. It is directly proportional to

;

Notable example of uniform generation of heat within conducting medium are
(i) Energy of a nuclear reactor
(ii) Liberation of energy due to some exormic chemical reactions
(iii) Resistance heating in electrical appliances
Which of statements made above are correct?

;

Suppose heat is conducted due to electrons
Where, i = I/A and p is resistivity, n

;

Dielectric heating apparatus consists of

;

The insulating material used in dielectric heating is

;

For a plane wall of thickness l with uniformly distributed heat generation q g per unit volume, temperature t 0 at mid plane is given by

;

Consider a slab of thickness δ with one side (x = 0) insulated and or side (x = δ) maintained at constant temperature. The rate of uniform heat generation within slab is q g W/m3. Presuming that heat conduction is in steady state and one dimensional along x direction, maximum temperature in slab would occur at x equal

;

A slab of insulating material of thickness 6 cm and rmal conductivity 1.4kJ/m hr deg is placed between and is in contact with two parallel electrodes, and is n subjected to high frequency dielectric heating at a uniform rate of 140,000kJ/m3 hr. At steady state coefficients of combined radiation and convection are 42 and 48 kJ/m2 hr deg. If atmospheric temperature is 25 degree Celsius, find surface temperatures?

;

Consider a 1.2 m thick slab of poured concrete (k = 1.148 W/m degree) with both of side surfaces maintained at a temperature of 20 degree Celsius. During its curing, chemical energy is released at rate of 80 W/m3. Workout maximum temperature of concrete

;