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| 1. |
How does the sign of the phase angle o, by which the supply voltage leads the current in an LCR series circuit, change as the supply frequency is gradually increased from very low to very high values ? |
| Answer» Solution :For very low frequencies `X_(C) gt X_(L)`and sign of phase ANGLE is --ve. As frequency of supply VOLTAGE is increased, VALUE of o becomes less negative till at RESONANT frequency value of phase angle `phi`is ZERO. For frequencies higher than resonant frequency `X_(L) gt X_(C)`and `phi`is +ve whose value goes on increasing with frequency. | |