DIRECT CURRENT (DC)
CALCULATIONS |

SERIES DC CIRCUITS

Total resistance = the sum of the individual resistance’s

R_{T} = R_{1} + R_{2} + R_{3} +....................

Total Voltage = the sum of the individual voltage drops

E_{a} = E_{R1} + E_{R2} + E_{R3} +.................

Total Current is determined by the Total Resistance (RT) of the circuit and Applied Voltage (Ea). It will be the same value at any point within the circuit.

I_{t} = I_{R!} = I_{R2} = I_{R3} =
......................

Total Power = sum of all power losses in the circuit.

P_{T} = P_{R1} + P_{R2} + P_{R3} + .................

PARALLEL DC CIRCUITS

Total Resistance = the reciprocal of the sum of the reciprocals.

For Multiple Branches:

For branches of __like__ value:

Where R_{B}
= resistance of one branch, N_{B} = # of branches

For __Only Two__ Branches:

Total Voltage is applied to each branch of a parallel circuit

E_{A} = E_{B1} = E_{B2} = E_{B3} = ...................

Total current = sum of the current in the individual branches.

I_{t} = I_{t1} + I_{t2} + I_{t3} +
......................

Total Power = sum of all power losses in the circuit

P_{t} = P_{R1} + P_{R2} + P_{R3} +.................

DIVIDER NETWORKS

The division of voltage and current in a circuit can be determined in the following manner :

Voltage Divider Current Divider

BRIDGE CIRCUITS

The relationships that exist in a bridge are indicated below

_{
}

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