Electronic Principles
The rise time of a pulse waveform is the time required for the voltage to rise:

None of these
from 10% of the peak value to 90% of the peak value
from zero to its peak value
from 10% of the peak value to 70.7% of the peak value
from zero to its rms value

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

The total current in a parallel circuit is always less than the smallest amount of current
The same current always flows through every part of a parallel circuit
The amount of current flow through each branch of a parallel circuit can be different, depending on the resistance of each branch part and the amount of voltage applied to it
None of these
The total current in a parallel circuit is equal to the total voltage multiplied by the total resistance

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Electronic Principles
The north pole of a magnet is the one:

None of these
that would be repelled by the south pole of another magnet
that has its molecules arranged in a random pattern
that would be attracted to the earth's north magnetic pole
that would be attracted to the earth's south magnetic pole

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

The total voltage lags the total current by less than 90
None of these
The total voltage is equal to the sum of the voltages across the resistance and inductance
The total voltages is less than 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

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