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Electronic Principles

Electronic Principles
A zener diode has a voltage of 10 V and a current of 20 mA. What is the power dissipation?

200 mW
10 mW
20 mW
None of these
300 mW

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

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

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

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

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Electronic Principles
The saturation point is approximately the same as

lower end of the load line
None of these
upper end of the load line
infinity
cutoff point

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

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

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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:

commutator
rotor
None of these
armature
battery

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