0
direct band gap-semiconductor in which the bottom of the conduction band and the top of the valence band occur at the momentum k=0;in the case of d.b.s. energy released during band-to-band electron recombination with a hole is converted primarily into radiation (radiant recombination); wavelength of emitted radiation is determined by the energy gap of semiconductor; examples of d.b.s. GaAs, InP, ZnS, ZnSs, CdS, CdSe etc.
indirect bandgap semiconductor --semiconductor in which bottom of the conduction band does not occur at effective momentum k=0, i.e. is shifted with respect to the top of the valence band which occurs at k=0; energy released during electron recombination with a hole is converted primarily into phonon; e.g. Si, Ge, GaP, GaAsp ,Ge etc, .
What else can I help you with?
Give two examples of engineering and non-engineering application of a control system?
examples of engineering and non engineering?
What is the difference between electrical devices and electronic devices?
Electronic devices works on low level dc voltage like 48volts and less than that. We cannot give direct line supply to electronic devices, for this transformer is used to convert ac voltage to required dc level... Whereas in electric devices we can use direct line supply (110V/220V) ac. These devices can also be operates on dc volts but greater than 48volts
Does drilling a hole in electrical bus to install a lug reduce the ampacity rating of it?
It would take an electrical engineer to give you a more direct answer but here is mine. When you drill the hole, of course that lowers the ampacity. But then you fill it with a bolt and the lug and nut are touching the bus. And the lug is usually much thicker than the bus to begin with. So in the field we don't worry about it.
How do you terminate direct burial wire?
Answer for USA, Canada and countries running a 60 Hz supply service.Termination of direct burial wire is done as you would terminate any other set of wires. However, direct burial does not mean you can direct bury the terminations. The wire must be brought into a building by an approved method; or the wire must be brought into a box designed for burial, with the box accessible from the surface of the ground; or the wire must be brought into a piece of equipment that is partially buried and designed for that purpose.In no case should the wire reach a depth of less than the minimum required depth for the installation without being protected by conduit. And in no case should the wire enter a building without conduit unless installing UF cable is allowed without conduit in the installation.As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.Before you do any work yourself,on electrical circuits, equipment or appliances,always use a test meter to ensure the circuit is, in fact, de-energized.IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.
What is class AB push pull amplifier and give its circuit and description .?
"What is class AB push pull amplifier and give its circuit and description .?"
Can you give 5 examples of sentences with direct and indirect object?
give 5 sentences of direst object
The difference between direct taxs and indirect taxs and give examples of each?
The difference between direct taxes and indirect taxes with examples is that direct taxes come directly from a person's income or personal property taxes. Indirect taxes comes from sales and excise taxes.
Give examples of 5 direct DISCOURSE and indirect too?
5 example of sentence direct discourse->describes the direct reporting of what someone said in another context.
Is you a direct or indirect object?
"You" can be either a direct or indirect object: It is a direct object in "I want to kiss you." It is an indirect object in "Henry is going to give you the tickets."
Will you please give us some examples of indirect speech that is change to direct speech?
He wrote the book. The book was written by him.
What is the direct and indirect object in did the woman give the dog any food?
Direct- food Indirect- dog
Give three examples of direct costs associated with fire losses Give three examples associated with indirect fire losses?
An example of direct loss would be Loss of life,loss of structure, and loss or vehicle. An example of indirect loss would be unemployment, reduced property value, reduced tax base.
Where is the direct and indirect object in the sentence will you please give the nurse a seat?
Seat is the direct object. To find a direct object, identify the subject and verb, and ask what? who?You is the subject, and give is the verb. What did you give? A seat.The indirect object is who or what receives the direct object. Who received the seat? The nurse. Nurse is the indirect object.
Examples of indirect objects and direct objects?
The boy kicked the ball. The boy is the subject, kicked is the verb and the ball is the direct object We drank water. We is the subject, drank is the verb and water the direct object. They sent him a letter. This is really They sent a letter to him. They is the subject, sent the verb and a letter is the direct object. to him is the indirect object.
Give you some examples of indirect object?
Give the letter to me.
What is the difference between direct expense and indirect expense in financial account?
give the full chart of the direct and indirect expenses . detail about this
How would you put this entence into a diaphragm of indirect object and direct object my aunt will give me a videotape?
In the sentence, 'My aunt will give me a videotape.', the direct object is 'videotape', the indirect object is 'me'. will give -> videotape (to me)
