It Is Better to Send 10,000 KW of Electric Power

question 31

Multiple Choice

It is better to send 10,000 kW of electric power long distances at 10,000 V rather than at 220 V because:

• A)there is less heating in the transmission wires
• B)the resistance of the wires is less at high voltages
• C)more current is transmitted at high voltages
• D)the insulation is more effective at high voltages
• E)the iR drop along the wires is greater at high voltage

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Definitions:

Standard Error

A measure of the dispersion or spread of sample means around the population mean.

Confidence Interval

A range of values, derived from a data set, that is likely to contain the value of an unknown population parameter.

Confidence Interval

A range of values, derived from sample statistics, that is likely to contain the value of an unknown population parameter.

Confidence Interval

A range of values, derived from the sample statistics, that is likely to contain the value of an unknown population parameter.