Electronic Principles MCQ

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Electronic Principles MCQ

Question 1 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In an intrinsic semiconductor, the number of free electrons
A
Equals the number of holes
B
Is less than the number of holes
C
Is greater than the number of holes
D
Impossible to say
Question 2 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A device that converts mechanical into electrical energy is?
A
solar cell
B
thermocouple
C
chemical cell
D
generator
Question 3 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which one of the following kinds of materials has the lowest permeability?
A
A diamagnetic material
B
A paramagnetic material
C
A feiTomagnetic material
D
All of the above
Question 4 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The total impedance of a parallel RLC circuit:
A
always increases as the applied frequency increases
B
is equal to the sum of the values of resistance, inductive reactance and capacitive reactance
C
always decreases as the applied frequency increases
D
is maximum at the resonant frequency
Question 5 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The rise time of a pulse waveform is the time required for the voltage to rise:
A
from zero to its rms value
B
from zero to its peak value
C
from 10% of the peak value to 70.7% of the peak value
D
from 10% of the peak value to 90% of the peak value
There are 5 questions to complete.

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