面试题与答案

Ohm's Law states that the current passing through a conductor is directly proportional to the voltage across its ends, provided the temperature remains constant.

Example:

I = V/R, where I is current, V is voltage, and R is resistance.

Grounding is the connection of electrical equipment or systems to the Earth, providing a reference point for voltages and enhancing safety.

Example:

A three-pronged power plug often includes a grounding wire for safety purposes.

Electric potential, or voltage, is the energy required to move a unit charge from one point to another in an electric field.

Example:

Voltage is measured in volts (V) and is a key parameter in electrical circuits.

Joule heating refers to the process where electrical energy is converted into heat in a conductor due to its resistance.

Example:

Incandescent light bulbs rely on Joule heating to produce light.

A voltage regulator maintains a constant output voltage by adjusting its internal resistance, ensuring a stable power supply for connected devices.

Example:

Used in electronic circuits to prevent damage from voltage fluctuations.