the circuit at the right shows a 2 - cell, 2 - bulb circuit. bulb brightness and current is represented by…

the circuit at the right shows a 2 - cell, 2 - bulb circuit. bulb brightness and current is represented by starbursts and arrowtails. which case correctly represents bulb brightness and current in a 2 - cell, 1 - bulb circuit? tap diagrams to select or deselect an answer.

the circuit at the right shows a 2 - cell, 2 - bulb circuit. bulb brightness and current is represented by starbursts and arrowtails. which case correctly represents bulb brightness and current in a 2 - cell, 1 - bulb circuit? tap diagrams to select or deselect an answer.

Answer

Explanation:

Step1: Understand circuit principles

In a simple circuit with two - cells in series and one bulb, the voltage provided by the two - cell battery is higher than that of a single - cell battery. According to Ohm's law $I=\frac{V}{R}$ (where $I$ is current, $V$ is voltage and $R$ is the resistance of the bulb, assuming the resistance of the bulb remains constant), a higher voltage results in a higher current flowing through the bulb.

Step2: Relate current to brightness

The brightness of a bulb is related to the power dissipated in it, and power $P = I^{2}R$ (for a resistive load like a bulb). A higher current means more power is dissipated in the bulb, and thus the bulb is brighter. The diagram with the most starbursts (indicating brightness) and the thickest arrowtails (indicating current) is the correct one.

Answer:

The diagram with the brightest - looking bulb (most starbursts) and the thickest arrowtails for current.