9-7 ltween the hase cur- load is I. F 2. F 3, T 4. F 5. wavef g Questions 9-6. D

Question

9-7

ltween the hase cur- load is I. F 2. F 3, T 4. F 5. wavef g Questions 9-6. Does it matter whether we say "the current leads the voltage by 290 degrees" or "the c rent lags the voltage by 70 degrees"? Why? 9-7. When a resistance load and a reactance load ar in series, which phasor (voltage or current) is used as the reference? Why? 9-8. When a resistance load and a reactance load are in parallel, which phasor (voltage or current) is used as the reference? Why? 9-9. When power is calculated, does it mat- ter whether the current or the voltage is the reference? Why? 51OVA

Explanation / Answer

9-7.

Ans: current

In a circuit with all series elements, the current is same for all the elements, but the voltage across each element may lead or lag the voltage. So we will use current as reference phasor.

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