Voltage, current and resistance

Voltage is measured in __.

• volts.
• watts.
• coulombs. 

What is the current in an electric circuit?

• The energy of the circuit

• The flow of electrons in the circuit

• The power of the circuit

Tags

NGSS.HS-PS2-5

Current has units:

• volt

• ampere

• coulomb

What is Resistance?

• The flow of electrons

• Electric potential difference

• A measure of the opposition to current flow in an electrical circuit.

What is resistance measured in?

• Ω (Ohms)

• V (Volts)

• A (Amps)

What 'flows' in a wire?

• Protons

• Neutrons

• Electrons

Tags

NGSS.HS-PS2-5

A student uses a length of wire as a resistor. He makes a second resistor from the same material.

To be certain of making a second resistor of higher resistance, he should use a piece of wire that is:

• longer and thicker.

• longer and thinner.

• shorter and thicker.

As the resistance of a circuit increases, the current will...

• Increase

• decrease

• stay the same

Which equation can be used to calculate the resistance R of a resistor?

• V = I / R

• I = V x R

• V = I x R

What would the circuit resistance be if a 7 Amp draw was present with the engine running and the charging system producing 14 Volts

• 15 Ohms

• 4 Ohms

• 2 Ohms