Ohm's Law Quiz

What is Ohm's Law?

• Ohm's Law only applies to circuits with constant current.

• Ohm's Law states that the resistance of a circuit is directly proportional to the voltage across it.

• Ohm's Law relates current, voltage, and resistance in a circuit.

• Ohm's Law is a mathematical equation used to calculate the power dissipated in a circuit.

What is the formula for calculating resistance?

• R = V/I

• R = V x I

• R = V + I

• R = V - I

What is the unit of current?

• C.

• B.

• D.

• A

What is the unit of voltage?

• watts (W)

• ohms (Ω)

• amperes (A)

• volts (V)

What is the unit of power?

• ohm

• ampere

• volt

• watt

If the resistance in a circuit is 10 ohms and the current flowing through it is 2 amperes, what is the voltage across the circuit?

• 20 volts

• 25 volts

• 15 volts

• 5 volts

If the voltage across a circuit is 12 volts and the current flowing through it is 3 amperes, what is the resistance of the circuit?

• 6 ohms

• 8 ohms

• 10 ohms

• 4 ohms

If the voltage across a circuit is 6 volts and the resistance of the circuit is 2 ohms, what is the current flowing through it?

• 3 amperes

• 4 amperes

• 1 ampere

• 2 amperes

If the current flowing through a circuit is 5 amperes and the resistance of the circuit is 8 ohms, what is the voltage across the circuit?

• 15 volts

• 40 volts

• 20 volts

• 10 volts

If the power dissipated in a circuit is 50 watts and the current flowing through it is 10 amperes, what is the voltage across the circuit?

• 100 volts

• 20 volts

• 2 volts

• 5 volts