E represents which quantity?

E represents which quantity?

• A. Capacitance
• B. Current
• C. Voltage (electrical pressure) in volts.
• D. Resistance

Answer: (C)

The main idea here is that E represents the electrical potential difference, the push that drives current through a circuit. That push is voltage, and it’s measured in volts. So E stands for voltage (electrical pressure) in volts. Capacitance is what stores charge and is measured in farads. Current is the flow of charge and is measured in amperes. Resistance is what opposes current and is measured in ohms. These are different electrical quantities, not what E denotes in standard circuit notation. When we talk about an energy source, E is often used to denote the emf, the driving voltage, which in ideal cases equals the voltage in volts.

The main idea here is that E represents the electrical potential difference, the push that drives current through a circuit. That push is voltage, and it’s measured in volts. So E stands for voltage (electrical pressure) in volts.

Capacitance is what stores charge and is measured in farads. Current is the flow of charge and is measured in amperes. Resistance is what opposes current and is measured in ohms. These are different electrical quantities, not what E denotes in standard circuit notation. When we talk about an energy source, E is often used to denote the emf, the driving voltage, which in ideal cases equals the voltage in volts.