1. What is Electric Power?
– Electric power is the rate at which electric energy is transferred or consumed.

2. Units of Electric Power:
– The standard unit for measuring electric power is the Watt (W).
– 1 watts is equal to 1 Joule of energy per second.

3. Calculating Electric Power:
– Electric Power (P) can be calculated using the formula:
P = V x I
Where:
– P is power in Watts (W).
– V is voltage in Volts (V).
– I am currently in Amperes (A).

P = VI

P = I2R

P = V2/ R

4. Voltage and Power:
– Higher voltage can result in the transmission of electrical energy more efficiently.
– Power loss in transmission lines is reduced at higher voltages.

Symbol	P
SI Unit	Watt, joule per second
Scalar or Vector	Scalar Quantity
Formula	P = VI

5. Current and Power:
– Power is also affected by the amount of current flowing through a circuit.
– Higher current generally results in higher power consumption.

6. Resistors and Electric Power:
– In a simple circuit with a resistor, power can also be calculated using the formula:
P = I^2 x R
Where:
– P is power in Watts (W).
– I am currently in Amperes (A).
– R is resistance in Ohms (Ω).

7. Energy Consumption:
– The total energy consumed (E) in a given time period can be found by multiplying power (P) by time (t):
E = P x t
Where:
– E is energy in Joules (J).
– P is power in Watts (W).
– t is time in seconds (s).

8. Examples of Electric Power:
– Common appliances and devices have power ratings in Watts. For example, a 100W light bulb consumes 100 Watts of power when in operation.

9. Efficiency and Electric Power:
– Efficiency measures how effectively an electrical device converts electrical energy into other forms (e.g., light or heat).
– Efficiency (%) = (Useful Power Output / Total Power Input) x 100

10. Renewable Energy and Power Generation:
– Renewable energy sources like solar panels and wind turbines generate electric power from natural resources like sunlight and wind.

11. Power Conservation:
– Reducing power consumption can save energy and lower electricity bills—simple actions like turning off lights when not in use can make a significant difference.

12. Safety Considerations:
– Electrical power can be dangerous. It’s essential to follow safety rules, avoid overloading circuits, and use proper insulation to prevent electric shocks and fires.

Let’s practice!