Ohm's Law

What is the unit of potential difference (voltage)?

• Volt (V)

• Ohm (Ω)

• Ampere (A)

• Coulomb (C)

What is the unit of current?

• Volt (V)

• Ohm (Ω)

• Ampere (A)

• Coulomb (C)

What is the unit of resistance?

• Volt (V)

• Ohm (Ω)

• Ampere (A)

• Coulomb (C)

What is the symbol for current?

• V

• R

• I

• C

What is the symbol for resistance?

• V

• R

• I

• C

What is the symbol for potential difference (voltage)?

• V

• R

• I

• C

What is Ohm's law?

• V=IR

• R=VI

• I=VR

• R=I/V

What is meant by "resistance"?

• The pressure from a power source that pushes current around a conducting loop

• The opposition to the flow of electric current through a conducting material.

• The stream of charged particles flowing in a circuit.

A circuit contains a 24 V battery and an 8 Ω resistor. What is the current flowing through the resistor?

• 3 A

• 192 A

• 16 A

• 0.3 A

A circuit contains two 1.5 V cells and an 60 Ω resistor. What is the current flowing through the resistor?

• 50 mA

• 0.05 mA

• 25 mA

• 90 mA