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Electronic Principles

Electronic Principles
The merging of a free electron and a hole is called

None of these
Lifetime
Recombination
Covalent bonding
Thermal energy

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

Number of lines of force
Reluctance
None of these
Flux density
Magnetomotive force

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Electronic Principles
A battery is a device composed of one or more:

chemical cells
None of these
piezoeletric cells
voltage generators
solar cells

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Electronic Principles
At room temperature a conductor has low many holes?

many
Only those produced by thermal energy
less than the free electrons
Same number as free electrons
None of these

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Electronic Principles
Which is the most widely used semiconductor?

Copper
Silicon
All of these
Germanium
None of these

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Electronic Principles
What is the phase shift between total current and voltage, if 100 ohm resistor connected in parallel with an inductor that has a reactance of 200W?

0 degree
26.6 degree
None of these
180 degree
90 degree

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