heat can flow from a body at low temperature to a body at
higher temperature only when ........ is supplied from an
external source
A). Voltage B). Current C). work D). Mass
- 7 Answers
- 7421 Views
- BMRCL, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / prasd
according to thermodynamic,the heat can flow from low
temperature to high temperature by external work. for
example air conditioner
| Is This Answer Correct ? | 22 Yes | 4 No |
Answer / ajeet
its "B" Electric...
Thermo electric devices do this. Thermo electric devices "pull heat" to one side and leave the other side cooler. Radiating the heat from the hot side causes the cool side to become cooler. Some computer heat-sinks are made from this stuff, DC powered drink coolers are often made from this. In inverse you can generate electricity by adding heat to one side and cooling it on the other, I think it's Mercedes that's experimenting with replacing alternators with this stuff.
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / parth
the correct answer would be (d) mass.
see, when you put a hot iron rod in water, it will transfer
its heat to the water and cool down, without providing any
voltage, current or doing any work on it. the only thing
required is a sufficient amount of water. so sufficient
Mass of water is required.
| Is This Answer Correct ? | 3 Yes | 9 No |
what is the efficiency of thyristor
why current flow throgh conductor.
why we use MV panels??? what's r all the needs
i have completed deee and i've (June2012-feb 2015 experience in electrical maintenance in pvt ltd company.company having HT & LT electrical power.how to apply electrical C-license ,NOW I was resigned my job,what are requirements of applying for c-license
In brushless excitation system how generator field current is measure even if the slip rings are absent?
what is the burdon in case of relays?
The size and construction of bushings in a transformer depend upon?
Can you used moeller lzm1 mccb in a dc system with 125vdc and 20ka short circuit current , beside is it have 24 or 48 volt shunt ? Beside how long current can through from An MCB shunt contacts? (like Z7-AS 24 V)?
Why are the HV motors are connected in star connection?
What will happened. if we feed 3phase supplay to the stater with out insert the rotor. How much current will flow through the stater winnding?
How one can say about a device (e.g: a light holder contains 20 or 30 L.E.Ds which glows when power supply is off, from which source they are getting the supply..... battery or capacitor) without removing and opening up its case ?
what is the write prosidure of stringing of 8meter pcc pole.
-
Civil Engineering (5085) - Mechanical Engineering (4452)
- Electrical Engineering (16632)
- Electronics Communications (3918)
- Chemical Engineering (1095)
- Aeronautical Engineering (239)
- Bio Engineering (96)
- Metallurgy (361)
- Industrial Engineering (259)
- Instrumentation (3014)
- Automobile Engineering (332)
- Mechatronics Engineering (97)
- Marine Engineering (124)
- Power Plant Engineering (172)
- Textile Engineering (575)
- Production Engineering (25)
- Satellite Systems Engineering (106)
- Engineering AllOther (1379)
