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Electronic Principles

Electronic Principles
In a step-down transformer, which is larger?

None of these
Secondary voltage
Impossible to say
Neither
Primary voltage

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Electronic Principles
The direction of electron current flow is:

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

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Electronic Principles
How may valence electrons does a silicon atom have?

4
None of these
1
2

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Electronic Principles
A zener diode has a voltage of 10 V and a current of 20 mA. What is the power dissipation?

10 mW
None of these
300 mW
20 mW
200 mW

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Electronic Principles
A resistor has a rated value of 100 ohm and a tolerance of 10%. What is its minimum and maximum allowable resistance value?

98 Ohm - 100.1 ohm
99 Ohm - 102 ohm
90 Ohm - 110 ohm
None of these
90 Ohm - 101 ohm

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Electronic Principles
A circuit has two different voltage sources that are connected in a series-opposing form. If the sources are rated at 6 V and 9 V, what is the total source voltage?

None of these
8 V
7.5 V
3 V
16 V

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