How is an electric field generated?

• A. By a magnetic field
• B. By a voltage difference between two points
• C. By a flow of electrons
• D. By resistance in a circuit

Answer: (B)

An electric field is generated by a voltage difference between two points. When there is a difference in electrical potential, it creates a force that can affect the movement of charged particles. This potential difference establishes an electric field in the surrounding space, which exerts a force on any charges present within the field.

It’s important to understand that while magnetic fields can influence electric fields, and the flow of electrons can create a current that interacts with fields, the presence of an electric field is fundamentally linked to the voltage difference across two locations. Voltage serves as the driving force that establishes this field, enabling electrical power to be transmitted and utilized in circuits.

In contrast, while the flow of electrons can be related to electric currents, it is the voltage that initiates the electric field, not the flow itself. Similarly, resistance in a circuit affects current flow but does not directly generate an electric field.