FIGURE 22.

CURRENT IN A SERIES CIRCUIT.

voltage.

This statement can be proven by an examination of the circuit

shown in figure 23 on the following page.

In this circuit, a source

potential (ET) of 20 volts is dropped across a series circuit consisting of

two 5 Ohm resistors. The total resistance of the circuit (RT) is equal to

the sum of the two individual resistances, or 10 Ohms! Using Ohm's law, the

circuit current may be calculated as follows:

Given:

ET = 20 volts

RT = 10 Ohms

Since the value of the resistors is known to be 5 Ohms each, and the current

through the resistors is known to be 2 amperes, the voltage drops across the

resistors can be calculated. The voltage (E1) across R1 is therefore: