Question

State your own theoretical and experimental objections to the following statement: In a circuit with two thick-filament bulbs in series, the bulb farther from the negative terminal of the battery will be dimmer, because some of the electron current is used up in the first bulb. Cite relevant experiments.

Short answer

The two bulbs will glow equally brightly since the current through them is the same.

Step-by-step solution

Given data

Two bulbs are in series in a circuit.

Current in a circuit

The current in a circuit where all loads and batteries are connected in series, is equal everywhere.

Determination of the glow of the two bulbs

Experimentally it can be checked by connecting two bulbs in a series that they glow equally brightly. Theoretically since the same number of electrons are passing per unit time through the two bulbs in series after steady state is reached, the current through both of them is the same. Hence the glow will not be affected. Electrons don't get used up when they pass through a load. The two bulbs will glow equally brightly.