three cell of 2.0, .5,1.8v are connected in series.
if their battery are connected to an external resistance 4 ohms. calculated the total current flowing in the circuit
To calculate the total current flowing in the circuit, we need to use Ohm's law and Kirchhoff's voltage law.
First, let's consider the three cells connected in series. When cells are connected in series, their voltages add up.
The given voltages of the cells are:
Cell 1: 2.0V
Cell 2: 0.5V
Cell 3: 1.8V
The total voltage is the sum of these voltages:
Total voltage (Vtotal) = 2.0V + 0.5V + 1.8V
Vtotal = 4.3V
Now, we can use Ohm's law to calculate the total current (I) flowing in the circuit.
Ohm's law states:
I = V / R
where:
I is the current (in Amperes),
V is the voltage (in Volts), and
R is the resistance (in Ohms).
Given:
External resistance (R) = 4 ohms
Total voltage (Vtotal) = 4.3V
Now we can substitute the values into Ohm's law:
I = Vtotal / R
I = 4.3V / 4 ohms
I = 1.075 Amperes (A)
Therefore, the total current flowing in the circuit is 1.075 Amperes.