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Electronic Principles

Electronic Principles
What is the barrier potential of a silicon diode at room temperature?

0.7V
None of these
1 V
0.3V
2 m V per degree Celsius

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Electronic Principles
What is the smallest number of polarities required for current flow?

Two - a negative terminal and a positive terminal
Four - two negative and two positive
One - a negative terminal
None of these
Three - negative, positive and neutral terminals

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Electronic Principles
A step-down transformer has turns ration of 5:1. If the primary voltage is 120 Vrms, what is the secondary voltage?

24 V
None of these
18 V
12 V
30 V

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Electronic Principles
When the graph of current versus voltage is a straight line, the device is referred to as

Nonlinear
Linear
Active
None of these
Bipolar

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Electronic Principles
What are the main parts of an atom?

Protons only
Electrons, ions, and neutrons
Electrons, protons, and neutrons
Electrons, protons, and ions
None of these

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Electronic Principles
Which one of the following equations most directly determines the amount of current flowing through a resistor when you know the value of the resistor and the voltage drop across it?

E = I2R
None of these
E = PR
I = ER
I = E/R

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