Electronic Principles
What is the primary difference between primary and secondary cell batteries?

Primary-cell batteries use chemical cells, whereas secondary-cell batteries use an alternative energy source, such as thermal or magnetic energy, to supplement their outputs
Primary-cell batteries must be recharged at a much slower rate that secondary-cell batteries
Secondary-cell batteries can be recharged and used many times, whereas primary-cell batteries cannot be properly recharged
Primary-cell batteries can be recharged and used many times, whereas secondary-cell batteries cannot be properly recharged
None of these

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Electronic Principles
The total impedance of a parallel RLC circuit:

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

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