Q3 REVIEWER: Electrical Concepts

What is Ohm's Law?

• V = I * R

• V = I / R

• R = V * I

• I = V + R

If the voltage across a resistor is 12 V and the current is 3 A, what is the resistance?

• 4 ohms

• 9 ohms

• 15 ohms

• 36 ohms

A resistor has a resistance of 10 ohms, and the current passing through it is 2 A. What is the voltage?

• 20 V

• 5 V

• 2 V

• 12 V

What happens to the current if the resistance in a circuit is increased while keeping the voltage constant?

• The current increases

• The current decreases

• The current remains the same

• The voltage increases

A 9 V battery is connected to a resistor with 3 ohms of resistance. What is the current?

• 3 A

• 6 A

• 9 A

• 12 A

If the voltage across a resistor is doubled, and the resistance remains constant, what happens to the current?

• It doubles

• It is halved

• It quadruples

• It stays the same

Which of the following correctly describes the relationship between voltage, current, and resistance according to Ohm's Law?

• Voltage is directly proportional to current and inversely proportional to resistance.

• Voltage is inversely proportional to both current and resistance.

• Current is directly proportional to resistance and inversely proportional to voltage.

• Resistance is directly proportional to voltage and current.

A circuit has a voltage of 24 V and a resistance of 6 ohms. What is the current?

• 4 A

• 10 A

• 12 A

• 18 A

What is the unit of resistance?

• Ampere

• Volt

• Ohm

• Watt

A resistor in a circuit has a voltage of 15 V and the current passing through it is 5 A. What is the resistance?

• 3 ohms

• 10 ohms

• 20 ohms

• 30 ohms