According to Kirchhoff's law, what is true about voltages in a circuit?

According to Kirchhoff's Voltage Law (KVL), in any closed loop or mesh within an electrical circuit, the total sum of voltages around that loop must equal zero. This principle implies that the sum of all voltage rises (such as those from batteries or other power sources) must equal the sum of all voltage drops across passive components like resistors.

Voltage drops occur whenever current flows through a resistor, and each drop can be thought of as reducing the electrical potential within that circuit. Therefore, the correct choice accurately reflects that the sum of power voltages provided by the sources must balance with the sum of voltage drops across components that consume power, keeping the law of conservation of energy in mind. This equality maintains consistent voltage levels and current flow throughout the circuit.

Understanding Kirchhoff's Voltage Law is crucial for analyzing circuits, as it helps in designing and troubleshooting, ensuring that the electrical principles remain intact and that circuits operate efficiently.