Understanding Electrical Power: A Key to Mastering Assignments

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Understanding Electrical Power: A Key to Mastering Assignments

Leerdoel

What is Electrical Power?

Electrical power is the rate at which electrical energy is used by a device per second. It is measured in watts (W).

What was the unit of current, I.

A

Volts

B

Watts

C

Ampere

D

coulomb

Units of Measurement

Power is measured in watts (W), voltage in volts (V), and current in amperes (A).

P

:

I x U

The Power Formula

Power (P) = Voltage (U) x Current (I). This formula shows how power is calculated in an electric circuit.

Calculating Power

Example: A device using 10 volts and 2 amperes has 20 watts of power (P=10V x 2A).

Power in Real-World Applications

Devices like light bulbs and heaters use power, calculated to determine energy consumption.

Interactive Exercise

Calculate power for a device using 12 volts and 3 amperes. What is the power in watts?

What is the formula for power (P)?

A

P = IV

B

P = I + V

C

P = I - V

D

P = I / V

If current is 2A and voltage is 5V, power is?

A

10 Watts

B

7 Watts

C

3 Watts

D

12 Watts

What unit measures electric power?

A

Ohms

B

Watts

C

Volts

D

Amperes

I = 25 mA U= 6v what is P?

a Lamp has 6.3 W and 700mA what is the Voltage?

A lamp has 12v and 48W what is the current?