What is electrical pressure from a power source such as a battery?

What is electrical pressure from a power source such as a battery?

• A. Current
• B. Voltage
• C. Resistance
• D. Capacitance

Answer: (B)

Voltage is the electrical pressure that a power source like a battery provides to push charges around a circuit. It’s the potential difference between two points and is what drives current to flow when a complete path exists. In simple terms, more voltage means a stronger pushing force on the electrons, while the current that flows depends on this voltage and the circuit’s resistance via I = V/R. For example, across the same resistor, a 9-volt source will push more current than a 3-volt source. The other terms—current is the flow of charge, resistance is what opposes that flow, and capacitance is the ability to store charge.

Voltage is the electrical pressure that a power source like a battery provides to push charges around a circuit. It’s the potential difference between two points and is what drives current to flow when a complete path exists. In simple terms, more voltage means a stronger pushing force on the electrons, while the current that flows depends on this voltage and the circuit’s resistance via I = V/R. For example, across the same resistor, a 9-volt source will push more current than a 3-volt source. The other terms—current is the flow of charge, resistance is what opposes that flow, and capacitance is the ability to store charge.