DC Circuits:Parallel Circuits

Parallel Circuits

A parallel circuit (Figure 17-3) is defined as a circuit having more than one current path. The factors governing the operations of a parallel circuit are listed here:

1. The same voltage exists across each branch of the parallel circuit and is equal to that of the voltage source.

2. The current through each branch of a parallel circuit is inversely proportional to the amount of resistance of the branch (I 5 E/R).

introduction to basic electricity and electronics technology-0166

introduction to basic electricity and electronics technology-0167introduction to basic electricity and electronics technology-0168

1. What is the formula for total current in a parallel circuit?
2. What is the formula for total voltage in a parallel circuit?
3. What is the formula for total resistance in a parallel circuit?
4. What is the formula for total power in a parallel circuit?
5. Four resistors, 2200 ohms, 2700 ohms, 3300 ohms, and 5600 ohms, are connected in parallel with a battery rated at 9 volts. Solve  for all values of the circuit.

introduction to basic electricity and electronics technology-0169

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