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 ▸Why does a feather fall at the same rate as a hammer on the Moon?
Explain how a standing wave is formed
A cart starts at rest and moves freely down a ramp without friction or air resistance and descends 8 meters vertically, what is its speed at the bottom?
Students conducted a Young's experiment. Explain how pattern seen on the screen is created.