Energy Sources and Intro to Electricity

Transistors act like tiny "____________."

• Electron sources

• Switches

• Batteries

• Bees?

Is the amount of energy being transferred over a period of time.

• Power
• Energy
• Seconds
• Joules

What is the unit of measurement for power?

• Joules
• Watts
• Voltage
• Calories

Which appliance transfers the most energy per second? 

• Clock
• Lamp
• Desktop Computer
• Iron

Tags

NGSS.HS-PS3-4

How much energy does this appliance transfer per second?

• 240 V
• 50 Hz
• 150 W
• N533

Tags

NGSS.HS-PS2-5

A kettle transfers 1000J of energy every 2 seconds. Calculate its power.

• 2000 Watts
• 1000 Watts
• 500 Watts
• cannot be determined

What is the unit of measure for current?

• ampere

• current

• voltage

• ohms

How long will it take a 3500 W electric motor to convert 7890 J of electrical energy?

• 2.25 s

• 1 s

• 3.56 s

• 5. 5.04 s

Tags

NGSS.HS-PS3-1

A 2kW kettle is left on for 110 seconds. Calculate the electrical energy transformed in this time.

• 220,000 J

• 200 J

• 300 J

• 250,000J

Tags

NGSS.HS-PS3-1

Electrical power can be calculated using

• Resistance x Voltage
• Voltage x Current 
• Voltage ÷ Current