CE Predict/Explain 24.46 Part A When the ac generator in the figure(Figure 1) op

Question

CE Predict/Explain 24.46 Part A When the ac generator in the figure(Figure 1) operates at high frequency, is the rms current in the circuit greater than, less than, or the same as when the generator operates at low frequency? greater than less than the same as Submit My Answers Give Up Part B Choose the best explanation from among the following OMore current flows at high frequency because in that limit the capacitor acts like an ideal wire of zero resistance Less current flows at high frequency because in that limit the inductor acts like an Figure 1 of 1 open circuit, allowing no current to flow The current is the same because at high frequency the inductor is like an open circuit, of the circuit is R and at low frequency the capacitor is like an open circuit. In either case the resistance Submit My Answers Give Up rovide Feedba Continue

Explanation / Answer

Capacitace reactance (Xc) of a capacitor at any particular frequency w is given by:

Xc = 1/(w*C) where C is the capacitance of the capacitor.

inductance reactance (XL) of a capacitor at any particular frequency w is given by

XL = w*L   where L is the inductance of inductor .

Now at very high w the Xc (effective resistance offered by a capacitor ) will be negligilble and the capacitor will be like a short circuit and inductor will be like open circuit thus the equivalent resistance of resistors will be R, while in the case when the w is very low then Xc will be very high and behave like open circuit and inductor is behave like short circuit so almost all current will flow through the upper part of the circuit and thus offering net effective resistance of R. Hence in the former case the rms current will be same as the latter case.

Part A ) correct answer is option 3 i.e. same as the.

Part B ) correct answer is option 3 .  

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