Question

With the circuit shown, if the ac voltage source has a constant voltage but increases in frequency what happens to magnitude of the current in the circuit? current decreases Choose current decreases current increases stays the same w Vs current increases Vs R R stays the same

Answer 1

Ті eller mm L impedance, Z = R + JWL magnitude IZL) = √ R² + W²22 i= IVI √ R² + W²22 If frequency, w increases i decreases 2 Ini Vs C ER impedance, z = RllXc = R(-3/w) R-5/wc -jR (RWC-j) magnitude, Izl= R R²w²c²+1 Current, اولا | ia IVs ) 121 R Rw²C²+1 [Vs] (a+wc+1) R of frequency, w → increases i increases =

Iri impedance, Z= RIIR mann www = R.R - ald Vs R&R Current , i=1 Vsi So, if w- i. 211) R/2 R increases Remains same as does not depend on (4 impedance, Z= R11 XL Vs le mm = R (JWL) R+jWL Z= magnitude, I ZI jROL RtjwL RWL ✓ R²+W²L² R R? W? 2+1 increases R² W2L2 decreases increases magnitude ,IZI current , i = IVsi IZ) ľ a decreases . w increases

S Ini ER Vs impedance, z= Rt Xc = R-- WE magnitude, 1Z1 = R² + 1 Lok (2 . Current, IVI 121 IV R²+ 2 w²c2 magnitude, Izl= R²+ (z) w increases decreases i > → increases as w increases 6 ER impedance Z= RfR=2R ER i= IVsi 2R Para If wn increases it remains the same as does not depend on frequency, w