Electronic Principles
A circuit has two different voltage sources that are connected in a series-aiding form. If the sources are rated at 6 V and 9 V, what is the total source voltage?

7.5 V
15 V
None of these
8 V
16 V

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Electronic Principles
Current is

The number of free electrons in an atom
None of these
The flow of charged particles through a material
An imbalance of electrical charges
The force that causes electrons to flow

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