Purchase Solution

Basic electrical circuit engineering

Not what you're looking for?

Ask Custom Question

A circuit consists of three resistors in series, with values 200 ohms, 100 ohms and 60 ohms. The circuit is connected to a battery with an output of 36 volts.

a. What is the current flowing in the series circuit?

b. The battery is replaced by a sine wave source with a frequency of 60.0 Hz and a peak voltage 36.0 volts. What is the RMS current flowing in the series circuit?

c. In the circuit described in part (b) above, how much power is dissipated in the 200 ohms resistor?

d. A telephone handset has a resistance of 600 ohms. It is connected to the local telephone exchange at a distance of 5 km by a twisted pair that has a loop resistance of 200 ohms per km. The telephone exchange has a 48.0 V battery that is connected to the twisted pair through a 400 ohms resistor. What is the DC current through the handset when it is off-hook?

Purchase this Solution
Solution Summary

A series circuit is examined with three given series pure resistances. A battery is connected of known DC voltage and the current flowing in the series circuit deduced. A sine wave generator of know amplitude and frequency replaces the battery and the RMS current that flows and the power dissipated is deduced. A telephone line of known parameters is given and the DC current that flows through the handset for such a system is deduced.

Solution Preview

Please see the attachment as well for clear symbols and drawing in (d).

(a) As it is a series circuit with just resistance we can say that by Ohm's law

Voltage (V) = Current (I) x Total Resistance (R (tot))

i.e. V = IR(tot) (1)

We are asked to find the current so we rearrange (1) to make I the subject when we do this we get (2).

I = V/R(tot) (2)

Now total resistance is sum of series resistance so we can deduce

R(tot) = 100 + 200 + 60 Ohms = 360 Ohms

Now we ...

Purchase this Solution
Free BrainMass Quizzes
Introduction to Nanotechnology/Nanomaterials

This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.

Intro to the Physics Waves

Some short-answer questions involving the basic vocabulary of string, sound, and water waves.

The Moon

Test your knowledge of moon phases and movement.

Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.

Variables in Science Experiments

How well do you understand variables? Test your knowledge of independent (manipulated), dependent (responding), and controlled variables with this 10 question quiz.

View More Free Quizzes
Related BrainMass Solutions

  • Three parallel resistors

    Electrical and Computer Engineering, Electric Circuits Other Three parallel resistors An electrical circuit consists of a set of three parallel resistors (A,B, and C) which are connected in series with another set of two parallel resistors,

  • Op-Amp

    376492 Electrical Engineering: Op-Amp 1. Show that gain rolls-off at -6 dB/octave for a passive LP filter. 2. (a) Write down the expression for the frequency-dependent open-loop gain of an operational amplifier.

  • How does software engineering differ?

    electrical and mechanical engineering?

  • General Electrical Engineering Questions

    589000 General Electrical Engineering Questions 1. For the circuit given in FIGURE 1 the power factor is 0.72 lagging and the power dissipated is 375 W.

  • Porblems in electrical Engineering

    261431 Porblems in Electrical Engineering Representative problems: 1. A function is continuous but its first derivative has a finite discontinuity at the origin. What is your estimate of the rolloff rate? 2.

  • Solve: Circuit Elements

    This solution provides a full explanation which gives reasoning for the position taken on this electrical engineering based question. This solution is comprised of around 210 words.

  • Closed Loop Transfer Function in an Electrical Circuit

    Electrical circuit problem asking for a calculation of the closed loop transfer.

  • Power Electronics

    engineering based questions.

  • Null and Alternative Hypotheses

    Null Hypothesis: "There is no correlation between GRE total score and GPA from an electrical engineering master's program."

  • Letter to an engineering manager

    The intent of the RFP is for the preliminary engineering (application study), and to assess the electrical consumption in both the underground mine and the surface facilities.

View More Related Solutions