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Electronic Principles

Electronic Principles
Which one of the following devices is most often used for measuring electrical potential difference?

None of these
Ohmmeter
Ammeter
Wattmeter
Voltmeter

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Electronic Principles
The barrier potential accross each depletion layer is

0.7 V
None of these
0.8 V
20 V

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Electronic Principles
What is the capacitive reactance of a 0.1 micro F capacitor that is operating at 1000 Hz?

less than 1 Ohm
None of these
312 Ohm
1590 Ohm
690 Ohm

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Electronic Principles
The direction of electron current flow is:

from right to left
None of these
from negative to positive
from positive to negative
from neutral to positive

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Electronic Principles
Most AC power is obtained from:

generators
None of these
batteries
lightning
oscillators

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Electronic Principles
The total impedance of a series RLC circuit:

always decreases as the applied frequency increases
always increases as the applied frequency increases
is maximum at the resonant frequency
None of these
is minimum at the resonant frequency

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