Electrical Power and Energy!

If the voltage (U) is 10 volts and the current (I) is 2 amps, what is the power (P) transmitted?

• 5 watts

• 20 watts

• 12 watts

• 8 watts

What unit is used to measure electrical power?

• Volts

• Amps

• Watts

• Ohms

If a device operates at 120 volts and consumes 3 amps of current, what is the power consumption?

• 360 watts

• 40 watts

• 120 watts

• 30 watts

Which of the following is the correct unit for measuring electrical energy?

• Joules

• Watts

• Volts

• Amperes

How many watts are equivalent to 1 kilowatt?

• 10 watts

• 100 watts

• 1000 watts

• 10000 watts

If a light bulb uses 60 watts of power for 2 hours, how much energy does it consume in joules? (Use the conversion 1 watt = 1 joule/second)

• 7200 joules

• 432000 joules

• 120 joules

• 3600 joules

What is the relationship between power, voltage, and current?

• Power is the sum of voltage and current.

• Power is the difference between voltage and current.

• Power is the product of voltage and current.

• Power is the ratio of voltage to current.

If a device operates at 240 volts and has a power rating of 480 watts, what is the current flowing through the device?

• 2 amps

• 4 amps

• 6 amps

• 8 amps

What is the power consumed by a device that operates at 5 volts and draws 0.5 amps of current?

• 2.5 watts

• 10 watts

• 0.5 watts

• 1 watt

Which of the following correctly describes the unit of electrical energy?

• It is the same as power.

• It is measured in joules.

• It is measured in volts.

• It is measured in amps.