In a series circuit, the current is constant throughout the circuit. This means that the same amount of current flows through each component connected in series. The reason for this is that there is only one path for the current to flow, so it cannot split or change as it moves through the circuit.
For example, if you have a series circuit with a battery and two resistors, the current that flows through the first resistor will be the same as the current that flows through the second resistor. This is because the current has no other path to take and must pass through each component in sequence.
It’s important to note that while the current is constant, the voltage across each component can vary depending on its resistance. This is described by Ohm’s Law, which states that voltage (V) is equal to current (I) multiplied by resistance (R): V = I × R. Therefore, in a series circuit, the voltage drops across each resistor will add up to the total voltage supplied by the battery.