The circuit diagram below, contains a combination of three resistors, with resistance R, a
cell with EMF of 12 V and switch, S
- The resistors are connected in series, which means that the same current flows through each resistor in the circuit.
- The cell provides a voltage of 12 V, which drives the current through the resistors.
- The switch, S, can be opened and closed to control the flow of current in the circuit. When the switch is closed, the circuit is completed, and current flows through the resistors. When the switch is open, the circuit is broken, and no current flows.
- The total resistance of the circuit can be calculated by adding the individual resistances of the three resistors in series:
Total resistance, R_total = R + R + R = 3R
- The current flowing in the circuit can be calculated using Ohm's Law:
I = V / R_total = 12 V / 3R = 4 A
- The potential drop across each resistor can be calculated using the formula V = IR:
V_R1 = 4 A * R = 4R V
V_R2 = 4 A * R = 4R V
V_R3 = 4 A * R = 4R V
Overall, this circuit diagram shows how a combination of resistors in series with a cell and switch can be used to control the flow of current and the potential drops across each resistor.