Electric Energy and Power Quiz

What is electric energy defined as?

• Energy transferred when electric charge moves through a potential difference
• Energy stored in batteries
• Energy produced by solar panels
• Energy lost as heat

Which formula represents electric energy?

• E = QV
• E = Pt
• E = I²R
• All of the above

What does the 'P' in the power formula P = VI represent?

• Potential difference
• Power
• Energy
• Charge

If a device uses 2 kW of power for 4 hours, how much energy does it consume in kWh?

• 8 kWh
• 6 kWh
• 4 kWh
• 2 kWh

How is electric power measured?

• In Joules
• In Watts
• In Volts
• In Amperes

What is the cost of running a 1.5 kW appliance for 5 hours if the cost per kWh is $0.10?

• $0.75
• $1.00
• $0.50
• $1.50

Which of the following is a correct way to calculate the cost of electricity?

• Cost = Power (kW) × Time (hours) × Cost per kWh
• Cost = Energy (J) × Time (s)
• Cost = Power (W) × Time (h)
• Cost = Voltage (V) × Current (A)

What is 1 kWh equivalent to in Joules?

• 3.6 million Joules
• 1 million Joules
• 3.6 thousand Joules
• 360 Joules

If a heater runs for 2 hours at 3 kW, how much energy does it use in kWh?

• 6 kWh
• 4 kWh
• 2 kWh
• 3 kWh

What is electric energy?

• Energy transferred when electric charge moves through a potential difference
• Energy stored in a battery
• Energy from the sun
• Energy from moving objects