Circuits

https://www.youtube.com/watch?v=R0bE1K5TIBY HEWITT PARALLEL https://www.youtube.com/watch?v=a0Tbnb_5ock Hewitt resistance in circuits

Circuits

Parallel circuit

Parallel circuit

Parallel circuit CURRENT

Parallel circuit RESISTANCE

Parallel circuit RESISTANCE

Parallel circuit RESISTANCE

Parallel circuit VOLTAGE

Parallel circuit VOLTAGE

SUMMARY Series Parallel Current I=V/R Voltage V= IR Resistance R=V/I Same at all parts of the circuit FIND THE TOTALS FIRST IF YOU CAN… MAKES IT EASIER It = I1 = I2= I3… Is shared between all parts. It = I1 + I2+ I3… Voltage V= IR Vt = V1 + V2+ V3… Same at all parts Vt = V1 = V2= V3… Resistance R=V/I Add them all up to find your total resistance. Rt = R1 + R2+ R3… Take the reciprocal 1 = 1 + 1 + 1… Rt R1 R2 R3

In a parallel circuit, each current path is called a branch. The presence of branch lines means that there are multiple pathways by which charge can traverse the external circuit. In parallel circuits, each branch shares a direct connection to a battery.

3 light bulbs connected to a battery in a parallel circuit. The same parallel circuit as a circuit diagram.

Twice as many cars can travel on a double road, three times as many on a three-lane road and so on. One could say that these two roads are parallel to each other in that there is more than one path for the cars to follow. This analogy can be applied to parallel circuits.

Rules for Parallel Circuits The voltage is equal across all components in the circuit. All components share the same voltage. The voltage drops of each branch equals the voltage rise of the source. The voltage across R1 is equal to the voltage across R2 which is equal to the voltage across R3 which is equal to the voltage across the battery.

The current divides into separate branches such that the current can be different in every branch. The total current is equal to the sum of the individual branch currents. It is still the same amount of current, only split up into more than one pathway.

The total current is equal to the sum of the currents in the branches. Itotal = I1 + I2 + I3 + ...

When resistors are connected in parallel, the total resistance of the circuit decreases. The more branches you add to a parallel circuit, the lower the total resistance becomes. The total resistance of a parallel circuit is always less than the value of the smallest resistor.

Simple Circuits Series circuit Parallel circuit All in a row 1 path for electricity 1 light goes out and the circuit is broken Parallel circuit Many paths for electricity 1 light goes out and the others stay on

Make a motor https://www.youtube.com/watch?v=VhaYLnjkf1E Light Switch https://www.youtube.com/watch?v=o0MDBbH9eGk