Charge, Current, Voltage, Resistance, and Ohm's Law

What is charge?

• A property of electrons and protons that can cause attraction or repulsion.

• A property of electrons and protons that can cause only attraction.

• A property of electrons and protons that can cause only repulsion.

• The measure of electrical energy

What is the SI unit of charge?

• Volt

• Ampere

• Coulomb

• Ohm

Voltage is a measure of:

• Electrical resistance

• Electrical energy per charge

• Electrical power

• Electrical current

What is the SI unit of voltage?

• Watt

• Ampere

• Ohm

• Volt

Current is defined as:

• The potential difference between two points

• The amount of charge passing through a point per unit time

• The opposition to the flow of electric charge

• The measure of electrical energy

What is the SI unit of current?

• Volt

• Watt

• Ampere

• Ohm

Resistance is a measure of:

• Voltage

• Current

• Electrical conductivity

• Opposition to the flow of electric charge

What is the SI unit of resistance?

• Ohm

• Coulomb

• Ampere

• Volt

According to Ohm's Law, what is the relationship between voltage, current, and resistance?

• V = IR

• I = VR

• R = VI

• V = I/R

Calculate the current flowing through a resistor with a resistance of 10 ohms and a voltage of 20 volts.

• 2 A

• 10 A

• 0.5 A

• 20 A