Question

a circuit is a path along which electric current flows. how would changing the battery in a circuit from 9 volts to 1.5 volts most likely affect the circuit?
more electric charge would flow in the circuit.
less electric charge would flow in the circuit.
the resistance in the circuit would decrease.
the resistance in the circuit would increase.

Explanation:

According to Ohm's law $I=\frac{V}{R}$, where $I$ is current (amount of electric - charge flow per unit time), $V$ is voltage, and $R$ is resistance. Resistance is a property of the circuit components and is not affected by the battery voltage. When the voltage $V$ decreases from 9 volts to 1.5 volts and the resistance $R$ remains constant, the current $I$ decreases. Since current is the rate of flow of electric charge, less electric charge would flow in the circuit.

Answer:

Less electric charge would flow in the circuit.