I place a resistor and inductor in series across an AC generator. When the gener
ID: 2294985 • Letter: I
Question
I place a resistor and inductor in series across an AC generator. When the generator is set to a very high frequency, which component(s) will have a large amplitude of voltage?
Both the resistor and the inductor will have large maximum voltages across.
The resistor will have a large maximum voltage, but the voltage across the inductor will be zero.
The inductor will have a large maximum voltage, but the voltage across the resistor will be zero.
The resistor and the inductor will both have zero voltages across.
I place a resistor and capacitor in series across an AC generator. When the generator is set to a very high frequency, which component(s) will have a large amplitude of voltage?
Both the resistor and the capacitor will have large maximum voltages across.
The resistor will have a large maximum voltage, but the voltage across the capacitor will be zero.
The capacitor will have a large maximum voltage, but the voltage across the resistor will be zero.
The resistor and the capacitor will both have zero voltages across.
Both the resistor and the inductor will have large maximum voltages across.
The resistor will have a large maximum voltage, but the voltage across the inductor will be zero.
The inductor will have a large maximum voltage, but the voltage across the resistor will be zero.
The resistor and the inductor will both have zero voltages across.
Explanation / Answer
a)
When frequency is Very Large
Inductive reactance
XL=2pi*f*L= infintiy
so
Vr=I*R
VL=I*XL
so The inductor will have a large maximum voltage, but the voltage across the resistor will be zero.
b)
When frequency is Very Large
Capacitive reactance
Xc=1/2pifC =0
so
Vr=I*R
Vc=I*Xc =0
soThe resistor will have a large maximum voltage, but the voltage across the capacitor will be zero