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Electronic Principles

Electronic Principles
How many protons does the nucleus of a silicon atom contain?

29
None of these
48
4
14

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Electronic Principles
When operating below its resonant frequency, a series RLC circuit has the characteristics of a:

series RLC circuit operated above its resonant frequency
series RL circuit
None of these
purely resistive circuit
series RC circuit

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Electronic Principles
Current and voltage are said to be in phase when:

their waveforms are both ac or both dc
their waveforms cross through zero and reach positive and negative peaks at the same time
All of these
None of these
they have the same amplitude and frequency

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Electronic Principles
Which one of the following kinds of materials has the highest permeability?

A diamagnetic material
A paramagnetic material
A ferromagnetic material
None of these
All of these

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Electronic Principles
Reducing the amount of current through an inductor:

has no effect on the inductance
None of these
multiplies the value of inductance by four
multiplies the value of inductance by two
reduces the value of inductance by one-half

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

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