Electric Power

What do we use to run everyday appliances?

• Water Power

• Wind Power

• Solar Power

• Electric Power

What is electrical power?

• Electrical power is the speed of electrons in a wire
• Electrical power is the rate at which electrical energy is transferred by an electric circuit, measured in watts (W).
• Electrical power is the force of electricity in a circuit
• Electrical power is the brightness of a light bulb

Tags

NGSS.HS-PS3-2

What is power measured in?

• watts
• ohms
• volts
• joules

Incandescent bulbs are essentially ____________

• devices that produce light by emitting radiation
• devices that are resistors

• devices that produce light by using solar energy
• devices that produce light by chemical reactions

In a simple circuit such as a light bulb with a voltage applied to it, the resistance determines the current by_______________

• ignoring the voltage
• increasing the resistance
• applying Ohm's Law
• decreasing the current

What is electrical resistance?

• Electrical resistance is the opposition to the flow of electric current in a material.
• Electrical resistance is the enhancement of electric current in a material.
• Electrical resistance is the absence of electric current in a material.
• Electrical resistance is the facilitation of electric current in a material.

Which is not an equation to find power?

Tags

NGSS.HS-PS2-5

What is the resistance of a light bulb if the voltage is 60 and the amps is 2.3?

• 26.09 ohms
• 40.78 ohms
• 30.45 ohms
• 15.65 ohms

What is the current of a light bulb it is 70 watts and 120 volts?

• 0.75 amperes
• 1.2 amperes
• 0.5833 amperes
• 0.4166 amperes

What is the wattage of a light bulb if the ampere is 0.3 and the voltage is 150?

• 45 watts
• 60 watts
• 50 watts
• 30 watts