Download Homework 19 - WebPhysics

dirac (pd5546) – Hw19 – Gavrin – (10251)
1
This print-out should have 13 questions.
Multiple-choice questions may continue on
the next column or page – find all choices
before answering.
007 (part 3 of 3) 10.0 points
Find the amplitude of the voltage across the
inductor at resonance.
Answer in units of V.
001 (part 1 of 2) 10.0 points
In the purely inductive circuit in the figure
below, the inductance is 14 mH and the rms
voltage is 125 V.
14 mH
008 (part 1 of 2) 10.0 points
A 44.2 Ω resistor is connected in series with a
16.7 µF capacitor and a 60 Hz, 140 V source.
Find the current in the circuit.
Answer in units of mA.
Erms = 125 V
S
E = Emax sin ωt
Find the inductive reactance if the frequency is 44.5 Hz.
Answer in units of Ω.
002 (part 2 of 2) 10.0 points
Find the rms current in the circuit.
Answer in units of A.
003 (part 1 of 2) 10.0 points
In a certain series RLC circuit, the rms current is 12.4 A , the rms voltage is 228 V and
the current leads the voltage by 37◦ .
What is the total resistance of the circuit?
Answer in units of Ω.
004 (part 2 of 2) 10.0 points
Calculate the reactance XL − XC of the circuit.
Answer in units of Ω.
005 (part 1 of 3) 10.0 points
An AC power supply with a maximum potential of 76 V is across a series RLC circuit,
where the inductance is 17 mH, the capacitance is 90 nF, the resistance is 29 Ω.
Find the resonant frequency.
Answer in units of kHz.
006 (part 2 of 3) 10.0 points
Find the amplitude of the current at the resonant frequency.
Answer in units of A.
009 (part 2 of 2) 10.0 points
What is value of the inductor that must be
inserted in the circuit to reduce the current to
one-half the previous current?
Answer in units of H.
010 (part 1 of 2) 10.0 points
A particular inductor has appreciable resistance. When the inductor is connected to a
17 V battery, the current in the inductor is
2.73 A. When it is connected to AC source
with an rms output of 17 V and a frequency
of 51 Hz, the current drops to 1.98 A.
Find the impedance at 51 Hz.
Answer in units of Ω.
011 (part 2 of 2) 10.0 points
Find the inductance of the inductor.
Answer in units of mH.
012 (part 1 of 2) 10.0 points
In a series RLC circuit, the resistance is 46 Ω,
the capacitance is 80 µF and the inductance
is 53 mH. The AC generator provides an rms
voltage of 100 V operating at 700 rad/s.
Find the power supplied by the source.
Answer in units of W.
013 (part 2 of 2) 10.0 points
Find the power dissipated in the resistor.
Answer in units of W.