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Electronic Principles

Electronic Principles
Positive ions are atoms that have

Lost an electron
Lost a proton
Gained a proton
Gained an electron
None of these

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Electronic Principles
The direction of electron current flow is:

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

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Electronic Principles
If a load resistance is 1 kW, a stiff voltage source has a resistance of

At least 10 Ohm
Less than 100 k Ohm
None of these
less than 10 Ohm
More than 100 k Ohm

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Electronic Principles
A device that converts mechanical pressure to electrical energy is called a:

nicad cell
photodiode
piezoelectric device
solar cell
None of these

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Electronic Principles
A current source has an internal resistance of 100 kW. What is the largest load resistance if the current source must appear stiff?

1 k Ohm
None of these
20 k Ohm
10 k Ohm
2 k Ohm

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Electronic Principles
Two diodes are in series. The first diode has a voltage of 0.75 V and the second has a voltage of 0.8 V. If the current through the first diode is 500 mA, what is the current through the second diode

11 mA
None of these
10 mA
14 mA
12 mA

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