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?

None of these
8 V
7.5 V
15 V
16 V

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Electronic Principles
The total impedance of a parallel RLC circuit:

always increases as the applied frequency increases
is maximum at the resonant frequency
None of these
is equal to the sum of the values of resistance, inductive reactance and capacitive reactance
always decreases as the applied frequency increases

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Electronic Principles
The total inductive reactance of a parallel inductor circuit is:

equal to the sum of the individual inductance values
equal to the sum of the individual inductive-reactance values
equal to the source voltage divided by total current
None of these
less than the inductance value of the smallest inductor

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