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Electronic Principles

Electronic Principles
Silicon atoms combine into an orderly pattern called a

Valence orbit
Crystal
Covalent bond
Semiconductor
None of these

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Electronic Principles
Current can flow through a normally open push button switch as long as:

its contact remain open
its contact remain open
you are not pressing the button
None of these
you are pressing the button

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Electronic Principles
The primary impedance of a transformer is 60 ohm and the secondary impedance is 120 ohm. What is the impedance ratio?

180
0.25
4
None of these
0.5

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Electronic Principles
Absolute Zero temperature equals

-276o C
-273o C
0o C
None of these
25o C

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Electronic Principles
The secondary voltage for a certain power transformer is twice the voltage applied to the primary. The current flowing in the secondary winding will be:

One-half the primary current
Same as the primary current
Twice the primary current
None of these
No more than 10% less than the primary current

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Electronic Principles
The voltage across a 1N4001 is 0.93V when the current is 1A. What is the power dissipation of the diode for these values?

0.93 V
0.93 W
9.3 W
None of these
0.041666666666667

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