Exercise: Materials And Components

Questions for: Materials And Components

Automobile ignition systems use the principle of
A:
resistance
B:
self inductance
C:
mutual inductance
D:
capacitance
Answer: C

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

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The application of magnetic field to superconducting material
A:
increases transition temperature
B:
decreases transition temperature
C:
has no effect on transition temperature
D:
may increase or decrease the transition temperature
Answer: B
No answer description is available. Let's discuss.
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If temperature is increased, the temperature coefficient of a metal
A:
increases
B:
decreases
C:
may increase or decrease
D:
remains constant
Answer: B
No answer description is available. Let's discuss.
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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.

A:
Both A and R are true and R is correct explanation of A
B:
Both A and R are true but R is not correct explanation of A
C:
A is true but R is false
D:
A is false but R is true
Answer: B
No answer description is available. Let's discuss.
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The probability of recombination of electrons and holes in a semiconductor is proportional to
A:
density of electrons
B:
density of holes
C:
density of electrons and holes
D:
none of the above
Answer: C
No answer description is available. Let's discuss.
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