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Electronic Principles

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

Neither
Impossible to say
None of these
Secondary voltage
Primary voltage

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

4
14
29
48
None of these

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Electronic Principles
Which one of the following properties of a magnetic circuit can be directly compared to resistance in an electrical circuit?

Permeability
There is no valid comparison
Permeance
Retentivity
Reluctance

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

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

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Electronic Principles
In a transistor operates at the middle of the load line, an increase in the base resistance will move the Q point

None of these
up
down
nowhere
off the load line

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

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

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