Electronic Principles
What is the total resistance of a parallel circuit that contains two resistors having values of 220 ohm and 470 ohm?

220 ohm
445 ohm
690 ohm
None of these
150 ohm

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Electronic Principles
What is a free electron?

An electron that has twice the amount of charge of a normal electron
An electron that has been freed from its parent atom
An electron that has no electrical charge
None of these
An electron that costs nothing

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

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

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Electronic Principles
A high-pass filter:

has no effect on ac signals
increases the level of all frequencies by a significant amount
passes lower-frequency signals and reduces higher-frequency signals
None of these
passes higher-frequency signals and reduces lower-frequency signals

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