Purchase Solution

Ohm's Law

Not what you're looking for?

Ask Custom Question

Please only do review questions 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 2.10 and problems 2.2, 2.3, 2.4,2.5, and 2.6.

Attachments
Purchase this Solution

Solution Summary

This set of basic questions has been solved using Ohm's law, Kirchhoff's laws etc..

Solution Preview

Please see the attached file.

SOLUTION

2.3 Power of the heater (i.e. the energy consumed by the heater per second) = P = VI = I2R = V2/R where V = Voltage applied, I = Current flowing, R = Resistance of the heater ...........(1)

Here, P = 1.5 kW = 1.5 x 1000 = 1500 W, I = 12 A.

Using P = VI and substituting values we get : 1500 = 12 x V or V = 125 Volts

2.4 Using P = I2R and substituting P = 2 W and R = 80 k ohm = 80000 ohm, we get :
________
2 = I2 x 80000 or I2 = 2/80000 = 25 x 10-6 or I = √25 x 10-6 = 5 x 10-3 A = 5 mA

I = 5 mA

2.5 Number of branches (b), number of independent loops (l) and number of nodes (n) are related by the equation : l = b - (n - 1).

Here, l = 8, b = 12. Substituting we get : 8 = 12 - (n - 1). Solving we get n = 5

2.6 As per Ohm,s law : I = V/R where I = Current in the circuit, V = Net voltage in the circuit and R = Total resistance in the circuit.
In the given circuit : R = 6 + 4 = 10 ohm
To find the net voltage we note that the two voltage sources tend to send currents in opposite directions. 3 V source sends current in clockwise direction and 5 V in anticlockwise ...

Purchase this Solution


Free BrainMass Quizzes
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.

Basic Physics

This quiz will test your knowledge about basic Physics.

Intro to the Physics Waves

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

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.

The Moon

Test your knowledge of moon phases and movement.