What is heat dissipation ?

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1 Answer

Answer :

dissipation reaction is when a compound breaks down into one or more compounds or elements by applying heat. For example: PCl5 + heat = PCl3 + PCl2
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Related questions

What new breakthrough in mobile phone heat dissipation: successfully developed 0.3mm ultra-thin VC soaking plate with 5W heat dissipation power?

Description : What new breakthrough in mobile phone heat dissipation: successfully developed 0.3mm ultra-thin VC soaking plate with 5W heat dissipation power?

Last Answer : iBee Parts - Professional Factory Supplier For iPhone Samsung Huawei LCD Screen & Battery Repair Parts Replacement. Following heat pipe heat dissipation, VC heat sink technology has ... first domestic company to adopt precision etching microstructure integrated capillary core technology, and the

Unnecessary and frequent applications of varnish to the generator windings to repair defective insulation will result in ____________. A. heavy coatings of varnish interfering with heat dissipation B. deficient air gap clearance and eventual damage to the casing C. failure of the rectifier assembly D. a built-up of varnish without changing generator operation

Description : Unnecessary and frequent applications of varnish to the generator windings to repair defective insulation will result in ____________. A. heavy coatings of varnish interfering with heat dissipation B. ... of the rectifier assembly D. a built-up of varnish without changing generator operation

Last Answer : Answer: A

How the heat dissipation is improved by providing the cooling tubes?

Description : How the heat dissipation is improved by providing the cooling tubes?

Last Answer : The cooling tubes will improve the circulation of oil. The circulation of oil is due to effective pressure heads produced by columns of oil in tubes. The improvement in cooling is accounted by taking the specific heat dissipation due to convection as 35% more than that without tubes.

The purpose of lubrication in an antifriction bearing is (a) to reduce the friction between balls and races (b) dissipation of frictional heat prevention of corrosion (c) protection of the bearing from dirt and other foreign particles (d) all of the mentioned

Description : The purpose of lubrication in an antifriction bearing is (a) to reduce the friction between balls and races (b) dissipation of frictional heat prevention of corrosion (c) protection of the bearing from dirt and other foreign particles (d) all of the mentioned

Last Answer : (d) all of the mentioned

Choose the best definition of dielectric loss. a) Absorption of electric energy by dielectric in an AC field b) Dissipation of electric energy by dielectric in a static field c) Dissipation of heat by dielectric d) Product of loss tangent and relative permittivity

Description : Choose the best definition of dielectric loss. a) Absorption of electric energy by dielectric in an AC field b) Dissipation of electric energy by dielectric in a static field c) Dissipation of heat by dielectric d) Product of loss tangent and relative permittivity

Last Answer : a) Absorption of electric energy by dielectric in an AC field

Potential flow is characterised by the (A) Irrotational and frictionless flow(B) Irrotational and frictional flow(C) One in which dissipation of mechanical energy into heat occurs(D) Formation of eddies within the stream

Description : Potential flow is characterised by the (A) Irrotational and frictionless flow (B) Irrotational and frictional flow (C) One in which dissipation of mechanical energy into heat occurs (D) Formation of eddies within the stream

Last Answer : (A) Irrotational and frictionless flow

Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m2.k), when the insulation thickness is __________ mm. (A) 15 (B) 25 (C) 10 (D) 30

Description : Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m2.k), when the insulation thickness is __________ mm. (A) 15 (B) 25 (C) 10 (D) 30

Last Answer : (B) 25

It is analogous to power dissipation to copper cables, impurities in the fiber absorb the light and covert it to heat. ∙ A. power loss ∙ B. absorption loss ∙ C. resistive loss ∙ D. heat loss

Description : It is analogous to power dissipation to copper cables, impurities in the fiber absorb the light and covert it to heat. ∙ A. power loss ∙ B. absorption loss ∙ C. resistive loss ∙ D. heat loss

Last Answer : B. absorption loss

It is analogous to power dissipation to copper cables, impurities in the fiber absorb the light and covert it to heaT

Description : It is analogous to power dissipation to copper cables, impurities in the fiber absorb the light and covert it to heaT

Last Answer : absorption loss

The mcrease in heat dissipation by air blasts is due to increase in (a) conduction (b) convection (e) radiation (d) any ofthe above

Description : The mcrease in heat dissipation by air blasts is due to increase in (a) conduction (b) convection (e) radiation (d) any ofthe above

Last Answer : (b) convection

The heated parts of an electrical machine dissipate heat into their surroundings by which of the following modes of heat dissipation ? (a) Conduction (b) Convection (c) Radiation (d) All ofthe above

Description : The heated parts of an electrical machine dissipate heat into their surroundings by which of the following modes of heat dissipation ? (a) Conduction (b) Convection (c) Radiation (d) All ofthe above

Last Answer : (d) All ofthe above

_______ is referred as the difference between available power and power budget? A. Fade margin B. Power margin C. Nominal gain D. Power dissipation

Description : _______ is referred as the difference between available power and power budget? A. Fade margin B. Power margin C. Nominal gain D. Power dissipation

Last Answer : B. Power margin

When adjusting an RF filter on a transmitter using a dummy load, how much watts dissipation should it stand to test a 150 watts transmitter? A. 75 watts B. 300 watts C. 50 watts D. 150 watts

Description : When adjusting an RF filter on a transmitter using a dummy load, how much watts dissipation should it stand to test a 150 watts transmitter? A. 75 watts B. 300 watts C. 50 watts D. 150 watts

Last Answer : D. 150 watts

What is the advantage of sidetone? A. High transmission efficiency B. Results to a strengthened signal C. No energy dissipation D. Assures that the telephone is working

Description : What is the advantage of sidetone? A. High transmission efficiency B. Results to a strengthened signal C. No energy dissipation D. Assures that the telephone is working

Last Answer : D. Assures that the telephone is working

Due to energy dissipation by viscous forces in air, if simple harmonic variations of a pendulum die away after some time, then oscillation is said to be: A. undamped B. free C. damped D. dependent

Description : Due to energy dissipation by viscous forces in air, if simple harmonic variations of a pendulum die away after some time, then oscillation is said to be: A. undamped B. free C. damped D. dependent

Last Answer : damped

The loss tangent is also referred to as a) Attenuation b) Propagation c) Dissipation factor d) Polarization

Description : The loss tangent is also referred to as a) Attenuation b) Propagation c) Dissipation factor d) Polarization

Last Answer : c) Dissipation factor

When the conduction current density and displacement current density are same, the dissipation factor will be a) Zero b) Minimum c) Maximum d) Unity

Description : When the conduction current density and displacement current density are same, the dissipation factor will be a) Zero b) Minimum c) Maximum d) Unity

Last Answer : d) Unity

Find the dissipation factor when series resistance is 5 ohm and capacitive resistance is 10 unit. a) 2 b) 0.5 c) 1 d) 0

Description : Find the dissipation factor when series resistance is 5 ohm and capacitive resistance is 10 unit. a) 2 b) 0.5 c) 1 d) 0

Last Answer : b) 0.5

direct shear test possesses the following disadvantage: (A) A relatively thin thickness of sample permits quick drainage (B) A relatively thin thickness of sample permits quick dissipation of pore pressure developed during the test (C) As the test progresses the area under shear, gradually changes (D) None of these

Description : direct shear test possesses the following disadvantage: (A) A relatively thin thickness of sample permits quick drainage (B) A relatively thin thickness of sample permits quick dissipation of pore pressure ... C) As the test progresses the area under shear, gradually changes (D) None of these

Last Answer : Answer: Option C

Which of the following types of falls use parabolic glacis for energy dissipation? (A) Vertical drop fall (B) Glacis fall (C) Montague type fall (D) Inglis fall

Description : Which of the following types of falls use parabolic glacis for energy dissipation? (A) Vertical drop fall (B) Glacis fall (C) Montague type fall (D) Inglis fall

Last Answer : Answer: Option C

For the protection of power station buildings against direct strokes the requirements are (a) interception (b) interception and conduction (c) interception, conduction and dissipation (d) interception, conduction, dissipation and reflection (e) none of the above

Description : For the protection of power station buildings against direct strokes the requirements are (a) interception (b) interception and conduction (c) interception, conduction and dissipation (d) interception, conduction, dissipation and reflection (e) none of the above

Last Answer : (c) interception, conduction and dissipation

An AC bridge that measures capacitance and dissipation factor

Description : An AC bridge that measures capacitance and dissipation factor

Last Answer : Schering Bridge

What are two components of Power dissipation.

Description : What are two components of Power dissipation.

Last Answer : There are two components that establish the amount of power dissipated in a CMOS circuit. These are: i) Static dissipation due to leakage current or other current drawn continuously from ... Dynamic dissipation due to - Switching transient current - Charging and discharging of load capacitances.

Define power dissipation?

Description : Define power dissipation?

Last Answer : Power dissipation is measure of power consumed by the gate when fully driven by all its inputs.

The major means for herbicide dissipation is which type of following degradation a). Microbial b). Chemical c). photo d). Physical

Description : The major means for herbicide dissipation is which type of following degradation a). Microbial b). Chemical c). photo d). Physical

Last Answer : a). Microbial

CMOS circuits are extensively used for ON-chip computers mainly because of their extremely (A) low power dissipation. (B) high noise immunity. (C) large packing density. (D) low cost.

Description : CMOS circuits are extensively used for ON-chip computers mainly because of their extremely (A) low power dissipation. (B) high noise immunity. (C) large packing density. (D) low cost.

Last Answer : Ans: C Because CMOS circuits have large packing density.

In digital ICs, Schottky transistors are preferred over normal transistors because of their (A) Lower Propagation delay. (B) Higher Propagation delay. (C) Lower Power dissipation. (D) Higher Power dissipation.

Description : In digital ICs, Schottky transistors are preferred over normal transistors because of their (A) Lower Propagation delay. (B) Higher Propagation delay. (C) Lower Power dissipation. (D) Higher Power dissipation.

Last Answer : Ans: A Lower propagation delay as shottky transistors reduce the storage time delay by preventing the transistor from going deep into saturation.

The digital logic family which has minimum power dissipation is (A) TTL (B) RTL (C) DTL (D) CMOS

Description : The digital logic family which has minimum power dissipation is (A) TTL (B) RTL (C) DTL (D) CMOS

Last Answer : (D) CMOS The digital logic family which has minimum power dissipation is CMOS. (CMOS being an unipolar logic family, occupy a very small fraction of silicon Chip area)

Compare Class A ,Class B, Class C and class AB power amplifiers on the basis of: i)Angle of conduction ii)Efficiency iii)Position of operating pointing power dissipation iv)Distortion

Description : Compare Class A ,Class B, Class C and class AB power amplifiers on the basis of: i)Angle of conduction ii)Efficiency iii)Position of operating pointing power dissipation iv)Distortion

Last Answer : Compare Class A ,Class B, Class C and class AB power amplifiers on the basis of: i)Angle of conduction ii)Efficiency iii)Position of operating pointing power dissipation iv)Distortion

Why in electric motor or generator heating due to current involves dissipation of electrical energy?

Description : Why in electric motor or generator heating due to current involves dissipation of electrical energy?

Last Answer : In electric motor or generator heating due to current involves dissipation of electrical energy because as the current increases there will be I2R losses. More current flow means more the heat will be generated and as the temperature of conductor increase its resistance increases.

Define following terms related to logic families : (i) Noise Margin (ii) FAN-OUT (iii) Propagation delay (iv) Power dissipation

Description : Define following terms related to logic families : (i) Noise Margin (ii) FAN-OUT (iii) Propagation delay (iv) Power dissipation

Last Answer : i) Noise immunity is measured in terms of noise margin. High state Noise margin = VNH = VOH(min) - VIH(min) Low state Noise margin = VNL = VIL(max) - VOL(max) i) The fan-out is defined as the ... logical 0 state (HIGH to LOW) iii) Average power dissipation is defined as PD(avg) = ICC(avg) * VCC

In class - A power amplifier, the collector dissipation is maximum when

Description : In class - A power amplifier, the collector dissipation is maximum when  (a) no signal is present  (b) signal swing is maximum  (c) signal swing is (1/1.414) of its maximum  (d) none of the above

Last Answer : In class - A power amplifier, the collector dissipation is maximum when no signal is present

In a CMOS inverter, the dynamic power dissipation

Description : In a CMOS inverter, the dynamic power dissipation  (A) decreases with power supply voltage  (B) increases with power supply voltage  (C) is independent of power supply voltage  (D) is zero

Last Answer : In a CMOS inverter, the dynamic power dissipation  increases with power supply voltage