Recent content by Engineer1

In pure crystals,such as,in silicon and germanium,the band gap is more than that in compound semiconductors,such as,GaAs.Why is that so.

Hey,thank you for your response. :smile:

In series resistances are added,this is what is done for calculations.But it is the same thing if one finds voltage drop at each resistance separately and thus the current flow. I heard somewhere that the current flow in load resistance decides the voltage drop in internal resistance of voltage...

yes,in series the resistances add and accordingly the total voltage drop and thus the current flow.

Practical voltage source has internal resistance as well.Mostly,for circuit analysis ideal voltage source is taken and that internal resistance is not considered.

In this circuit,first there will be voltage drop in the internal resistance of the voltage source.Mostly,the voltage source is assumed ideal in circuits,however,here a practical voltage source is assumed. So,there will be voltage drop in the internal resistance of the voltage source which will...

Thank you @anorlunda and @NascentOxygen I will check out those articles and then get back here,if required.

An ideal capacitor has power factor of zero degree leading as current leads the voltage in capacitor.But it also means that capacitor is generator of lagging reactive power.What does that mean.How does it do so.Capacitor is used for reactive power generation at inductive load sites.

Why can sometimes entropy remain constant with increase of temperature and vice versa?Entropy implies transfer of heat and heat must increase with temperature.I am unable to intuitively understand.

COMPARE THE ENTROPY CHANGES FOR SITUATIONS 1 AND 2 Situation 1 State 1: mass m 1kg of liquid at temperature ##T_{hot}## 60 degrees centigrade, and mass m 1kg of liquid at temperature ##T_{cold}## 10 degrees centigrade State 2: mass 2m of liquid at temperature ##(T_{hot}+T_{cold})/2##

Here is some more stuff which I found relevant

Thank you.

Also,why does 1kJ heat from 1000 kelvin reservoir has less entropy than 1kJ heat from 300 kelvin reservoir?Less entropy means more orderliness and more information in the system.

But heating of water also takes time in reaching a particular temperature.

Thank you.But mixing of waters of same mass but different temperature gives water with resultant temperature which is average of those temperatures.So,there is equal temperature in the resultant mixed water.It is still confusing.