Ohm's Law Calculations in DC Circuits Quiz Practice…

Q: What is the formula for Ohm's Law?

V = I * R — Ohm's Law relates voltage (V), current (I), and resistance (R).

Q: If a circuit has a voltage of 12V and a resistance of 4 ohms, what is the current flowing through the circuit?

3 A — Using I = V/R, 12V / 4 ohms = 3 Amperes.

Q: What is the unit of measurement for current?

Amperes (A) — Current is measured in Amperes, often abbreviated as Amps or A.

Q: If a circuit has a current of 2A and a resistance of 10 ohms, what is the voltage across the resistor?

20 V — Using V = I * R, 2A * 10 ohms = 20 Volts.

Q: What is the unit of measurement for resistance?

Ohms (?) — Resistance is measured in Ohms (?).

Q: If a 6V battery is connected to a lightbulb and the current flowing through it is 0.5A, what is the resistance of the lightbulb?

12 ohms — Using R = V/I, 6V / 0.5A = 12 ohms.

Q: Which of the following describes the relationship between voltage and current in a circuit with constant resistance?

Directly proportional — Voltage and current increase or decrease together at a constant rate.

Q: What happens to the current if the voltage is doubled and the resistance remains the same?

The current doubles. — Current is directly proportional to voltage, I = V/R.

Q: If the resistance in a circuit is increased, what happens to the current (assuming voltage is constant)?

The current decreases. — Current is inversely proportional to resistance, I = V/R.

Q: Calculate the current flowing through a 100-ohm resistor connected to a 20-volt source.

0.2 A — I = V/R = 20V / 100 ohms = 0.2A.

Question 1 of 10

What is the formula for Ohm's Law?

Ohm's Law relates voltage (V), current (I), and resistance (R).

Question 2 of 10

If a circuit has a voltage of 12V and a resistance of 4 ohms, what is the current flowing through the circuit?

Using I = V/R, 12V / 4 ohms = 3 Amperes.

Question 3 of 10

What is the unit of measurement for current?

Current is measured in Amperes, often abbreviated as Amps or A.

Question 4 of 10

If a circuit has a current of 2A and a resistance of 10 ohms, what is the voltage across the resistor?

Using V = I * R, 2A * 10 ohms = 20 Volts.

Question 5 of 10

What is the unit of measurement for resistance?

Resistance is measured in Ohms (?).

Question 6 of 10

If a 6V battery is connected to a lightbulb and the current flowing through it is 0.5A, what is the resistance of the lightbulb?

Using R = V/I, 6V / 0.5A = 12 ohms.

Question 7 of 10

Which of the following describes the relationship between voltage and current in a circuit with constant resistance?

Voltage and current increase or decrease together at a constant rate.

Question 8 of 10

What happens to the current if the voltage is doubled and the resistance remains the same?

Current is directly proportional to voltage, I = V/R.

Question 9 of 10

If the resistance in a circuit is increased, what happens to the current (assuming voltage is constant)?

Current is inversely proportional to resistance, I = V/R.

Question 10 of 10

Calculate the current flowing through a 100-ohm resistor connected to a 20-volt source.

I = V/R = 20V / 100 ohms = 0.2A.

Ohm's Law Calculations in DC Circuits Quiz