Silicon is not suitable for fabrication of light emitting diodes because it is An indirect band gap semiconductor Wideband gap semiconductor Direct band gap semiconductor Narrowband gap semiconductor TRUE ANSWER : ? YOUR ANSWER : ?
Which one of the following is not a characteristic of a ferroelectric material? High dielectric constant No hysteresis Electric dipole moment Ferroelectric characteristic only above the curie point TRUE ANSWER : ? YOUR ANSWER : ?
Assertion (A): In p-n-p transistor collector current is termed negative.Reason (R): In p-n-p transistor holes are majority carriers. A is true but R is false Both A and R are true but R is not a correct explanation of A Both A and R are true and R is correct explanation of A A is false but R is true TRUE ANSWER : ? YOUR ANSWER : ?
Assertion (A): A VMOS can handle much larger current than other field effect transistors.Reason (R): In a VMOS the conducting channel is very narrow. A is false but R is true Both A and R are true but R is not a correct explanation of A A is true but R is false Both A and R are true and R is correct explanation of A TRUE ANSWER : ? YOUR ANSWER : ?
In a half wave rectifier, the load current flows Only for the positive half cycle of the input signal For less than fourth cycle For full cycle Only for the negative half cycle of the input signal TRUE ANSWER : ? YOUR ANSWER : ?
Permalloy is A polymer A nickel an iron alloy having high permeability A variety of stainless steel A conon-ferrous alloy used in aircraft industry TRUE ANSWER : ? YOUR ANSWER : ?
Work function is the maximum energy required by the fastest electron at 0 K to escape from the metal surface. True False TRUE ANSWER : ? YOUR ANSWER : ?
Fermi level is the amount of energy in which A hole can have at room temperature Must be given to an electron move to conduction band An electron can have at room temperature None of these TRUE ANSWER : ? YOUR ANSWER : ?
When avalanche breakdown occurs covalent bonds are not affected. True False TRUE ANSWER : ? YOUR ANSWER : ?
Free electrons exist in Conduction band Third band Second band First band TRUE ANSWER : ? YOUR ANSWER : ?