Electrical power is the rate at which electrical energy is transferred by an electric circuit. It is measured in watts (W) and is the product of voltage (V) and current (I) in the circuit.

The formula to calculate electrical power is: **P = V * I** where P is the power in watts, V is the voltage in volts, and I is the current in amperes.

When an electrical device is connected to a power source, it converts electrical energy into other forms of energy, such as light, heat, or mechanical motion. The power rating of the device indicates how much electrical energy it can convert per unit time.

The unit of electrical power is the watt (W). One watt is equal to one joule per second.

To calculate the electrical power in a circuit, you need to know the voltage across the circuit and the current flowing through it. Using the formula P = V * I, you can find the power.

If a circuit has a voltage of 12 volts and a current of 4 amperes, then the electrical power would be: **P = 12V * 4A = 48W**

To understand electrical power, make sure to:

- Understand the concept of electrical power and its importance in electrical circuits.
- Be familiar with the formula for calculating electrical power: P = V * I
- Know the units of electrical power and how to convert between them (e.g., watts to kilowatts).
- Practice solving problems involving the calculation of electrical power in various circuits.
- Understand the relationship between electrical power, voltage, and current in a circuit.

Worksheet/Answer key

Electromagnetism Worksheet/Answer key

Electromagnetism Worksheet/Answer key

Electromagnetism

PHYSICAL SCIENCE (NGSS)

Energy

Students who demonstrate understanding can:

Design, build, and refine a device that works within given constraints to convert one form of energy into another form of energy.