Explore BrainMass


AC-LCR Circuits: Inductance, Capacitance and Frequency

Given 10V ac source, LCR series circuit, Imax at resonance=2 A; f= 200Hz Imax = 1.2A; f=350Hz Imax = 1.5A Given these parameters what is the resonant frequency and how did you get this value? What is L and C in the series circuit? Given these values what is the phase angle at f=250Hz?

LRC series circuit

Given 10Vmax ac source, LRC series circuit, Imax at resonance frequency Imax=2A; f= 200Hz; Imax = 1.2A; f=350Hz Imax = 1.5A What equations are used and how are the values found? What is the resonant freq and the phase angle at 250Hz?

Calculating the average power available with an AC source

The circuit of a resistor and a capacitor in series with an AC source that supplies an rms voltage of 240V. At the frequency of the source the reactance of the capacitor is 50.0 ohms. The rms current in the circuit is 3.0A. What is the average power supplied by the source?

AC circuits

(See attached file for full problem description with proper symbols) --- 5. A large air conditioner has a resistance of 7.7 and an inductive reactant of 35 . If the air conditioner is powered by a 60.0 Hz generator with an rms voltage of 240 V, find each of the following. (a) the impedance of the air conditioner (b) i

AC Circuit

4. The maximum current in a 21 µF capacitor connected to an ac generator with a frequency of 120 Hz is 0.12 A. (a) What is the maximum voltage of the generator? V (b) What is the voltage across the capacitor when the current in the circuit is 0.10 A and increasing? V (c) What is the voltage across the capacitor wh

Solving: Transformers

Hi, I need some assistance with the following problem on transformers. I need to discuss the mode of action of a transformer, step-up vs step-down transformers and the number of turns in the primary winding. Please view the attachment file for the full problem and figure.

Kirchoff's Rules

This is a question about Kirchoff's rules. Consider the group of resistors shown in the attachment, where R1 = 4.0 ohms and E = 9.1 V. Find the current in each resistor. And determine the potential difference between points A and B. Please see attached for diagram.

AC Generator

We have a AC generator that is attached to a resistor with 500 kohms and a maximum voltage of 90 V. How do you calculate Imax, max power, avg power, rms current, rms voltage, and frequency.

Solving: Alternating Currents

Question: A series RLC circuit is driven at a frequency of 500 Hz. The phase angle between the applied voltage and current is determined from an oscilloscope from measurement to be delta =75 degrees. If the total resistance is known to be 35 omega and the inductance is 0.15H, what is the capacity of the circuit?

Alternating currents - Phase angle, current, capacitance, and voltage

A coil is connected to a 60 Hz, 100-v ac generator. At this frequency, the coil has an impedance of 10 omega and a reactance of 8 omega. (a) What is the current of the coil? (b) What is the phase angle between the current and the applied voltage? The current and voltage so that current and voltage are in phase? (c) What series

Solving for Alternating Currents

Question: Find the Q factor and (b) the resonance width for the circuit in problem 70 and (c) the power factor when w=8000 rad/s? Problem 70 for reference: A series of RLC circuits with L=10 mH, C=2uF, and R= 5 omega are driven by a generator with a maximum emf of 100V and a variable angular frequency w. Find (a) the reson

Alternating currents

An emf of 10 V maximum and frequency 20 Hz is applied to to a 20uF capacitor. Find (a) 1 sub max and (b) I sub rms.

Comment on Frankenstein power supply

Hi. I've attached a circuit diagram. The schematic is for a dc power supply. It's purpose it to charge nicad batteries. However, we are having trouble locating the transformer. The transformer has been omitted, and the power is just represented by an AC power source. I'm a little unclear about the C-L-C portion of the

RC circuit frequency

Hi. Can someone please walk me through how to do the following problem? An RC circuit consists of a resistor R = 32 ohms, a capacitor C = 2.5 micro-F, and an ac generator with an rms voltage of 120 V. At what frequency will the rms current in this circuit be 2.9 A? Thank you.

Frequency: A Conceptual Question

Question: "Although an incandescent light bulb appears to shine with constant intensity, this is an artifact of the eye's persistence of vision. In fact, the intensity of a bulb's light rises and falls with time due to the alternating current used in household circuits. If you could perceive these oscillations, would you see the

AC Power and Transmission Lines

An AC power generating station provides single phase power to a consumer 100 the generator end of the voltage at miles away, over a transmission line. The voltage at the consumer end of the line is 10KV. The consumer uses exactly 100K watts of power at the distant end. If the wire in the transmission line has a resistance of 0

Cap / inductor questions

1) If caps block dc what is the purpose of a cap in a dc circuit? 2) What does an inductor do in a dc circuit? 3)What is the point of having a cap to ground in a dc circuit? 4)What is the purpose of a null modem? 5) How do you design a circuit to use caps or inductors in a dc circuit? An ac circuit? 6) What is a

AC Generator Consisting of Eight Turns of Wire

An AC generator consists of eight turns of wire, each of area .0756 m^2, and a total resistance of 8.38 Ohms. The loop rotates in the external magnetic field of strength .35 T at a constant frequency of 59.7 Hz. What is the maximum induced emf? Units if V What is the maximum induced current? Units of A