Question

Which of the following is true for the lag network:
A. An increase in frequency causes an increase in magnitude of the output voltage.
B. An increase in frequency causes an increase in phase lag.
C. A decrease in frequency causes an increase in phase lag.
D. A decrease in frequency causes a decrease in the magnitude of the output voltage.

Answer 1

In the above question, we have to find the correct option for the lag network. Firstly, learning about the lag network. Such networks mainly attenuate the high frequencies. Hence, increasing the frequency leads to lagging of the phase.

Complete answer:
Let us firstly, learn about the lag network. Lag network is used to describe the various methods for a multiple parallel network connection to increase throughout the limit. Lag full form is limit aggregation groups. Lag allows the switch to create multiple physical links between the two end-points of the single link. Management of the lag is done as a single physical port.

Now, in the question we have to find the correct option. The options are all about the frequency. Hence, studying the dependence of the frequency. The lag networks main use is to attenuate the high frequencies. In the lag network, as we increase the frequency leads to increasing the lagging of phase. The lagging phase defines the wave which lags behind another wave which is having the same frequency as the first one.

So, the correct option is B.

Note: Lag networks are being used for the attenuation of the high frequency and allowing only the low frequencies to pass. The phase is lagging in such networks, the lagging is done by the inductors which opposes the change in current and hence voltage and current no longer rises and leads to lagging of phase.