BASIC ELECTRONICS - OD1633 - LESSON 1/TASK 2
CURRENT IN A SERIES CIRCUIT.
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:
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: