Ohm's Law

In a circuit, a resistor has a resistance of 5 ohms and the current through it is 3 amperes. What is the voltage across the resistor?

• 10 volts

• 15 volts

• 20 volts

• 25 volts

A motor requires 240 volts to operate and draws a current of 8 amperes. What is the resistance of the motor?

• 20 ohms

• 25 ohms

• 30 ohms

• 35 ohms

A 9-volt battery is connected to a circuit with a resistance of 3 ohms. How much current flows through the circuit?

• 1 ampere

• 2 amperes

• 3 amperes

• 4 amperes

A circuit consists of a 24-volt power supply and a resistor with a resistance of 12 ohms. What is the current in the circuit?

• 1 ampere

• 2 amperes

• 3 amperes

• 4 amperes

A resistor has a resistance of 25 ohms, and the current passing through it is 2 amperes. Calculate the voltage across the resistor.

• 40 volts

• 45 volts

• 50 volts

• 55 volts

A circuit with a resistance of 8 ohms has a current of 1.5 amperes flowing through it. What is the voltage?

• 10 volts

• 12 volts

• 14 volts

• 16 volts

In an electric circuit, the current is 0.8 amperes and the resistance is 50 ohms. What is the voltage?

• 30 volts

• 35 volts

• 40 volts

• 45 volts

A lamp has a resistance of 40 ohms and is connected to a 12-volt battery. Calculate the current flowing through the lamp.

• 0.2 amperes

• 0.3 amperes

• 0.4 amperes

• 0.5 amperes

A circuit with a resistance of 10 ohms has a current of 2 amperes flowing through it. What is the voltage?

• 15 volts

• 20 volts

• 25 volts

• 30 volts

A resistor in a circuit has a voltage of 18 volts across it and a current of 6 amperes. What is the resistance of the resistor?

• 3 watts

• 3 volts

• 3 amps

• 3 Ω