Electronic Principles
Current and voltage are said to be in phase when:

their waveforms are both ac or both dc
All of these
None of these
their waveforms cross through zero and reach positive and negative peaks at the same time
they have the same amplitude and frequency

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

The total current in a series circuit is equal to the total voltage multiplied by the total resistance
The same current flows through every part of a series circuit
None of these
The amount of current flow through each part of a series circuit can be different, depending on the resistance of each part and the amount of voltage applied to it
The total current in a series circuit is equal to the sum of the currents flowing through the individual components in the circuit

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Electronic Principles
What is the difference between a conductor and an insulator?

An insulator has an excessive number of free electrons, while a conductor has a few free electrons or none at all
An insulator allows current to flow much easier than a conductor does
None of these
The difference between conductors and insulators depends on how they are used
A conductor allows current to flow much easier than an insulator does

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Electronic Principles
A farad is defined as the amount of capacitance necessary for:

causing an ac phase shift greater than 90 degree
changing the voltage on the plates at the rate of 1 V per second when 1 A of current is flowing
dissipating 1 W of power
storing 1 V for 1 second
None of these

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