In a purely inductive circuit, does the current lead or lag the voltage? In a re

Question

In a purely inductive circuit, does the current lead or lag the voltage? In a resistive-capacitive circuit, which of the following statements describes the relationship between current and voltage? The current leads the voltage by 90 degree. The current lags the voltage by less than 90 degree. The current and voltage are in phase. The current leads the voltage by less than 90 degree. The current lags the voltage by 90 degree. Given the circuit in Figure 17-29. find the unknown values. Given the circuit in Figure 17-30, find the unknown values. Given the circuit in Figure 17-31. find the value of the capacitors necessary to correct the power factor to 93%.

Explanation / Answer

Ans)

1. In purely inductive circuit current I=V/jXL=(V/XL)<-90 degrees,so current lags the voltage by 90 degrees

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2.Ans)

In Pure capacitive circuit which is opposite of inductive circuit current leads the voltage by 90 degrees,

but if you add resistance the phase is less than 90 deg

so answer is

d) current leads the volatge by less than 90 deg

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Only 1 question per post will be answered please,but i answered two here

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