Question

multiple choice question
the key to maintaining an electric current is ______
o maintaining a temperature above the freezing point of water
o maintaining a relative humidity that is less than the remaining electric potential
o maintaining a separation of charges
o allowing the charges to come in contact with one another
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Explanation:

Electric current is the flow of electric charge. A separation of charges creates an electric field which drives the current. Temperature above water's freezing point (\(0^{\circ}C\)) is irrelevant to current flow. Relative humidity and its relation to electric potential is not a key factor for maintaining current. Allowing charges to come in contact would neutralize them, stopping current. Maintaining charge separation (like in a battery with anode - cathode separation) keeps the potential difference (\(V = Ed\), where \(E\) is electric field and \(d\) is distance) that drives the current (\(I=\frac{V}{R}\), \(R\) is resistance).

Answer:

maintaining a separation of charges