A circuit with a voltage source of 18V, has 3 resistors all connected on parallel, values at 2ohms, 6ohms and 7.5ohms. Find the total circuit resistance, and then subsequently, the total current supplied and power dissipated in the curcuit.

The total resistance is found by the addition of resistors in parallel, in the equation (1/RT)=(1/R1)+(1/R2)+(1/R3), therefore the total resistance is 1.25ohms. Therefore the current is simply IT=VS/RT, which gives us a current of 14.4A, and using P=IxV, the power dissipated is 259.2W.

Answered by Harrison M. Physics tutor

1276 Views

See similar Physics A Level tutors

Related Physics A Level answers

All answers ▸

Explain, in terms of the behaviour of molecules, how a gas exerts a pressure on the walls of its container. (4)


Bernard says that a mass executing uniform circular motion is not accelerating as it's speed is not changing. Which parts of his statement are correct and which are false. For those which are false state why they are and give the correct version.


If a wire loop moves at constant speed into a region where there is a magnetic field, why is a current induced in the wire?


Describe simple harmonic motion (SHM). Sketch a displacement-time graph for a particle undergoing SHM and the corresponding velocity-time and acceleration-time graphs. Use these graphs to describe the relationship between accleration and displacment.


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences