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Electronics and Communication Engineering - Materials and Components

Exercise : Materials and Components - Section 9
26.
The probability of recombination of electrons and holes in a semiconductor is proportional to
density of electrons
density of holes
density of electrons and holes
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.

Assertion (A): The regular or irregular stacking of atoms has importanteffect on properties of materials.

Reason (R): The arrangement of atoms in a given material can be studied using X-rays.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not correct explanation of A
A is true but R is false
A is false but R is true
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
If temperature is increased, the temperature coefficient of a metal
increases
decreases
may increase or decrease
remains constant
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
The application of magnetic field to superconducting material
increases transition temperature
decreases transition temperature
has no effect on transition temperature
may increase or decrease the transition temperature
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
Automobile ignition systems use the principle of
resistance
self inductance
mutual inductance
capacitance
Answer: Option
Explanation:

A high voltage is induced due to mutual inductance because the number of turns in secondary coil is very high.

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