3 (920B)
1 ((1/r)+(1/r)+(1/r))^-1 2 that is the total resistance of the circuit if it is in parralel 3 we did this cool practical with a box to see where resistors are 4 when you have resistors in series the supply voltage is shared un evenly across the resistors 5 the sum of the voltages across the resistor will add up to the voltage from the power suply 6 if the resistors are of the same resistance the voltage will be an even split 7 greater voltage will go across the larger resistor 8 each component has the has an equal proportion of the total voltage compared to the proportion that the resistor is to the total voltage 9 10 (r1 / rt) = the proportion in restance 11 12 voltage across a componet = (r1 / rt) x VoltageTotal 13 14 kirchoff's first law, is that the current in all parralel branches adds up to the total current 15 his second law is that the sum of the energy in point equals the sum of potential differences around any loop of a circuit