Understanding Volts, Amps, and Watts

This video tutorial explains the concepts of volts, amps, and watts. It covers the definitions, units, and conversions of these electrical terms. The video also includes practical examples and problems to illustrate how to calculate voltage, current, and power in electrical circuits. Additionally, it discusses the relationship between these units and their real-world applications, such as in batteries and light bulbs.

What is the unit of electric potential energy per coulomb of charge?

• Amp

• Watt

• Volt

• Joule

How many millivolts are there in one volt?

• 10000

• 1000

• 100

• 10

What does one ampere of current represent?

• One joule per second

• One watt per second

• One coulomb per second

• One volt per second

How many electrons are approximately in one coulomb of charge?

• 6.25 x 10^18

• 1.6 x 10^-19

• 3.2 x 10^-19

• 9.1 x 10^-31

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

• Power = Voltage - Current

• Power = Voltage + Current

• Power = Voltage x Current

• Power = Voltage / Current

How much power is consumed if a device uses 8000 joules in 20 seconds?

• 100 watts

• 200 watts

• 800 watts

• 400 watts

Using Ohm's Law, how do you calculate current if you know voltage and resistance?

• Current = Resistance / Voltage

• Current = Voltage / Resistance

• Current = Voltage + Resistance

• Current = Voltage x Resistance

If a resistor absorbs 2.88 watts, how many joules does it absorb in 8 minutes?

• 1152 joules

• 1920 joules

• 2304 joules

• 1382.4 joules

What is the power rating of a laptop that draws 350 milliamps from an 18-volt supply?

• 6.3 watts

• 5.4 watts

• 8.1 watts

• 7.2 watts

How much current does a 200-watt TV draw from a 120-volt power supply?

• 2.5 amps

• 1.67 amps

• 1.2 amps

• 3.0 amps