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Electronic Principles

Electronic Principles
Positive ions are atoms that have

Lost a proton
Gained a proton
Lost an electron
None of these
Gained an electron

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Electronic Principles
The component that forms the electrical connection between the rotating coil of wire in a motor and the external source of electrical energy is called the:

None of these
commutator
armature
battery
rotor

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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?

Permeance
There is no valid comparison
Permeability
Reluctance
Retentivity

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

29
None of these
4
14
48

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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
4
0.5
None of these
0.25

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Electronic Principles
What is the phase shift between total current and voltage in the circuit of a 100 ohm resistor connected in parallel with a capacitor that has a reactance of 100 ohm

None of these
30 degree
180 degree
45 degree
75 degree

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