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Circuits

RL Circuit Analysis

In the following circuit (see attachment), assume that the switch has been open for a long time, and that it closes at time = 0 seconds. The switch remains closed thereafter. How do I solve for Vx(t) and Ix(t) as shown?

Making a voltage divider

Suppose that you have a 6.0 V battery and you wish to apply a voltage of only 4.0 V. Given an unlimited supply of 1.0 ώ resistors, how could you connect them so as to make a "voltage divider" that produced a 4.0 V output for a 6.0 V input?

Watts, Voltage

A 120 V house circuit (parallel) has the following bulbs and appliances turned on: 25 W, 40 W, 60 W, 900 W and 75 W. Find the equivalent resistance of these bulbs and appliances.

Current Flowing Through a Battery

In the figure attached, R1 = 19 ohms and R2 = 6.3 ohms. What is the current flowing through the battery immediately after the switch is closed, and what is it long after the switch is closed? Pleases see attached for diagram.

Logic Circuit Truth Table

1. Determine the truth table for the following logic circuits. 2. Design a combinational logic circuit to control segment "a" of the 7-segment calculator display. (See attachment for full question.)

Interpretation and Reasoning of Electric Fields

1) If a charge of 8uC is at the top of the y-axis and -1.2uC is at the origin. The distance between the is 3cm. a third charge 7uC is on the x-axis. The distance between the second and third charge is 4cm. find a) the electric field at the center of the triangle. b) The electric pote

Efficiency and power of circuit

The equivalent circuit of Figure P3.57 has Vt = 35 V and Rt = 600 ohms. If the conditions for maximum power transfer exist, determine the value of RL, power of RL, and efficiency of the circuit. See diagram in attached file.

Mesh analysis of circuit

Using mesh analysis, find the voltage gain Av = V2/V1 in the circuit. See attached file for full problem description.

Three Zones of a Single Phase Circuit

Three zones of a single-phase circuit are identified in the figure attached. The zones are connected by two transformers T1 and T2, whose ratings are also shown in the same figure. Using base values of 20kVA and 115 volts in zone-3 calculate the per-unit impedances. Neglect the transformer winding resistances and the shunt admit

Speech Scrambler, Descrambler, Balanced Modulator

A speech scrambler transforms low frequency to high frequency components and vice versa so that a baseband signal of bandwidth B is transformed to another baseband signal of the same bandwidth and a components at the frequency f is transformed into a component at the frequency B-f, where B is the bandwidth of the signal. An exam

Resonant Frequency of a Circuit

Refer to the diagram attached. 1. Calculate the resonant frequency of the circuit 2. Calculate the magnitude of the circuit current at resonance. 3. Calculate the value of VOUT at resonance. 4. Explain why the circuit current is capacitive (i.e. leads the supply voltage) at very low frequencies and inductive at very high fr

Fault Tolerant Volume Control

In a certain application the following circuit serves as a fault tolerant volume control. What value must the potentiometer (P) be in order for the total resistance to be 50ohms? See the attached file.

Virtual Circuits

The following design problem concerning implementation of virtual circuit service. If virtual circuits are used internal to the subnet, each data packet must have a 3-byte header, and each router must tie up 8 bytes of storage for circuit identification. If datagrams are used internally, 15-byte headers are needed, but no router

Question about Electrical Energy Conversion

A 100 kVA, 60 Hz, 7200/480 V, single-phase transformer has the following parameters (all expressed in ohms): RHV = 3.06 RLV = 0.014 XHV = 6.05 XLV = 0.027 Xm,HV = 17,809 Re,HV = 71,400 The transformer supplies a load that draws rated current at 0.75 power factor lagging at 480 V at the load. Sketch the approximate eq

Two power sources in a circuit

I need to find the voltmeter reading and how to deal with 2 power sources Is this going into Thevenins or Kirchoff's? (Please see the attachment.)

Please, show me how you got the answers and give me the answers. Thanks

1. A series RL circuit containing a 0.17-H inductor has a time constant of 0.13 s. What is the resistance in the circuit? 2. A 1000-ohm's resistor is joined in series with a 400-mH inductance and a 12-V battery. (a) What is the time constant of the circuit? (b) How long will it take after the circuit is completed for voltage

Charge flow from one capacitor to another

Why and how does charge flow from one capacitor to another capacitor when the two are connected to each other by a conducting wire? I am not able to understand that; why and how does negative charge flow from a capacitor having lower potential difference between its plates to a capacitor having higher potential difference betwe

Calculating charge of a capacitor and current in a circuit

Hi. Can someone please walk me through how to do the following problem? The capacitor in an RC circuit (R = 120 ohms, C = 45 micro-F) is initially charged. Find (a) the charge on the capacitor and (b) the current in the circuit one time constant after the circuit is connected to a 9.0-V battery." Thank you.

RC Circuit with Expulsion = 12.0 votes

Consider an RC circuit with epsilon = 12.0 V, R = 175 ohms, and C = 55.7 micro-F. Find (a) the time constant for the circuit, (b) the maximum charge on the capacitor, and (c) the initial current in the circuit.

LRC Circuits Damping

Please refer to the attached file. How much should damping ( ) affect the result of the angular frequency for impulse response? (see attachment) In equation XVI.5, the details of the differentiation of I(t) are omitted. Take the derivative of I(t) and explicitly show how the voltage across the inductor L varies with time.

Undistorted Sinusoidal Signals in a Diode Circuit

In the diode shown, the diodes are ideal except that each is modeled by a voltage source of 0.5V in series with a (diode) resistance of rd = 20, when forward biased. A sinusoidal signal Vs with input impedance Rs=100 is connected to the diode circuit. Determine the maximum value of Vs such that Vo remains sinusoidal, with no dis

Depletion-load NMOS amplifier & small-signal equivalent circuit

A depletion-load NMOS amplifier and its small-signal equivalent circuit are shown in the figures. For the small signal parameters gm1=0.2 and mA/V, gm2=0.04mA/V, ro1=ro2=50k and CL= 20pF, calculate the mid-band voltage gain Vo/Vi. ==================================== a) vo/vi = -2.5 v/v b) vo/vi = -1.5 v/v c) vo/vi = -2.0 v/

Define appropriate resistor values in a battery-charger circuit

The attached file shows the circuit in question along with information about the components (zener diode, op-amp, and BJT transistor). Problem Statement: The simple circuit shown below is a battery-charge circuit. It operates from a DC power supply having Vcc=22V. The fully charged NiCd battery pack exhibits Vb=12.08V. Opera

Seal-In Circuit with Internal Relay Control

Problem involves a seal-in circuit with an internal relay control. Please see attached for description. I'd like to see the ladder logic diagram as to how the problems are to be diagrammed. I had only two lines of ladder logic for part a, but I think there may be more. Can anyone give me a firm understanding on this?

Two transistor circuit problems

These are two transistor problems based on textbook (Electronic Circuit Analysis and Design, 2nd ed by Neamen). See attached file for full problem description.

An example of how to analyze a op-amp circuit

(i) The minimum recommended supply voltages for the 741 op-amp are V+=5V and V-=-5V. Using these lower supply voltages, calculate (a) Iref, Ic10, Ic6, Ic17, Ic13a, and (b) the voltage gains of the input and gain stages for the circuit values in the attached image. See attached file for full problem description.