Understanding Ohm's Law

What is the primary role of voltage in a circuit?

• To resist the flow of current

• To measure the flow rate of electricity

• To push electricity through the circuit

• To store electrical energy

If a circuit has a voltage of 12 volts and a resistance of 2 ohms, what is the current flow?

• 24 amps

• 3 amps

• 12 amps

• 6 amps

How does doubling the resistance in a circuit affect the current flow?

• The current flow becomes zero

• The current flow remains the same

• The current flow doubles

• The current flow is halved

What happens to the current flow when resistance is increased to 24 ohms with a 12-volt supply?

• The current flow becomes 3 amps

• The current flow becomes 1 amp

• The current flow becomes 0.5 amps

• The current flow becomes 2 amps

If you know the resistance is 4 ohms and the current is 3 amps, how can you find the voltage?

• Divide resistance by current

• Multiply resistance by current

• Subtract current from resistance

• Add resistance and current