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.
HM
Related Physics A Level answers
All answers ▸How do capacitors work and what are its units?
When a particle travels in a circle of radius r, at constant speed v, what is its acceleration
What is the equivalence principle of General Relativity and what does it mean?
The braking distance of a road train travelling at 15m/s is 70m. Assuming that the same braking force is applied at all speeds, show that the braking distance of a road train when travelling at 25m/s is about 190m.