Veda · OUT OF PURE CURIOSITY
What changes in a series circuit?
One resistor · Two in series · Open the circuit
What changes in a series circuit?
A 6 V source is connected to a 3 ohm resistor. Ohm’s law gives 2 A. Follow the circuit’s single path.
Two 3 ohm resistors are in series. Total resistance is 6 ohms and current is 1 A. The same current flows through both.
Open the switch. The path is broken and steady current is zero throughout the circuit.
For adults · discuss together
Ideal constant-voltage source; wire resistance is ignored. Dots symbolise current.
Before experience
Ask: “What do you think will happen?” Let the child check his guess first.
After the experience
What has changed? What remains the same? Where can you notice a similar phenomenon?
