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

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

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Electronic Principles
Which one of the following statements is true for the voltages in a series RL circuit?

The total voltage lags the total current by less than 90
The total voltage is less than the sum of the voltages across the resistance and inductance
The total voltages is equal to the sum of the voltages across the resistance and inductance
The voltage always has the same amplitude and phase for every part of the circuit
None of these

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Electronic Principles
Which one of the following statements is true for the voltage in a parallel RC circuit?

The total voltage is less than the sum of the voltages across the resistance and capacitance
None of these
The voltage always has the same amplitude and phase for every part of the circuit
The total voltage is equal to the sum of the voltages across the resistance and capacitance
The total voltage leads the total current by less than 90 degree

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Electronic Principles
The peak value of a sine waveform is:

the maximum positive or negative value
the amplitude at 70.7% of the maximum value
None of these
the amplitude at 90% of the maximum value
the amplitude at 1.41 times the maximum value

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