Current, Voltage, Resistance and Ohm's Law

Which of the following represents the rate of the flow of electricity, expressed in unit of amps?

• current

• circuit

• voltage

• resistance

Tags

NGSS.HS-PS2-5

Which of the following represents the opposition presented to the current by a material or device, measured in ohms?

• current

• resistance

• voltage

• electricity

Tags

NGSS.HS-PS3-5

In the model, what do the arrows represent?

• The flow of current

• The flow of resistance

• The flow of voltage

• The flow of positrons

Tags

NGSS.HS-PS2-5

A 3-V battery sends a current of 0.10 A through a light bulb. What is the resistance of the filament of the bulb?

• .033 Ω

• 30 Ω

• .3 Ω

• 300 Ω

Identify the parts of the following experiment. An electrician wants to know which wire brand contains the least resistance. She runs 120 volts through 10 meters of 5 different wires and measures their output. They determine that brand C has the lowest resistance because it has the highest average out after 30 trials.

• Wire electrical output

• Hypothesis

• If a wire has a higher electrical output, then it has a lower resistance

• Independent Variable

• Type of wire

• Conclusion

• Brand C has the lowest resistance

• Dependent Variable

• Wire length

• Control

What is the formula for voltage?

• V = (I x R) / 2

• V = I / R

• V = R / I

• V = I x R

Tags

NGSS.HS-PS2-5

What is the formula for current?

• I = V / R

• I = R / V

• I = V x R

• I = (V x R) / 2

Tags

NGSS.HS-PS2-5

What is the formula for resistance?

• R = I / V

• R = V / I

• R = V x I

• R = (V x I) / 2

Tags

NGSS.HS-PS2-5

If a charger for a tablet offers a voltage of 120V and has 240Ω of resistance, what is the amperage?

• 0.5A

• 2A

• 14,400A

• 28,800A

If an electric ceramic brush has a current of 0.3 amps and a voltage of 120 volts, what is the resistance?

• 18Ω

• 36Ω

• 200Ω

• 400Ω