Chapt. 33 Alternating Current or ACMultiple-Choice Problems033 qmult 00100 1 1 3 easy memory: AC defnition 11. Alternating current or AC means that current and potential vary about a mean value (usuallyzero) and usually (but not always)a) trapezoidally.b) parabolically.c) sinusoidally.d) geometrically.e) wretchedly.033 qmult 00110 1 1 2 easy memory: sawtooth and square-wave2. Sawtooth and square-wave variation oF current and potential can be reFerred to as,but they are not what one ususally means by the term.a) DCb) ACc) HVDCd) HI±Ie) WI±I033 qmult 00120 1 1 5 easy memory: victory oF AC3. AC won the “war oF the currents” in the 1880s as the preFerred method oF large electricalenergy transmission. But this wasn’t because AC is more naturally produced by electricalgenerators and used by electrical motors than DC. E²cient conversions between AC and DCexist and saying that AC is more “natural” For generators and motors is arguable actually. No
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