Ohm's Law and Power Calculations Mastery Quiz…

Q: What is the relationship between voltage (V), current (I), and resistance (R) according to Ohm's Law?

V = I * R — Ohm's Law states that Voltage equals Current multiplied by Resistance.

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

3 A — I = V/R = 12V / 4 Ohms = 3A.

Q: What is the unit of measurement for electrical power?

Watt (W) — Power is measured in Watts.

Q: Which of the following formulas correctly calculates power (P)?

P = V * I — Power equals Voltage multiplied by Current (P = V*I).

Q: A resistor has a current of 2A flowing through it and a voltage drop of 10V. What is the power dissipated by the resistor?

20 W — P = V * I = 10V * 2A = 20W.

Q: If a device consumes 100W of power and operates at 10V, what is the current flowing through it?

10 A — I = P / V = 100W / 10V = 10A.

Q: What is the relationship between power (P), current (I), and resistance (R)?

P = I² * R — Power can also be calculated as P = I² * R.

Q: What is the resistance of a 100W lightbulb operating at 120V?

144 ? — P=V²/R, R = V²/P = 120²/100 = 144?.

Q: A 5-Ohm resistor has 4A flowing through it. What is the power dissipated?

80 W — P = I² * R = 4² * 5 = 80W

Q: What happens to the current in a circuit if the voltage is doubled, and the resistance remains constant?

The current doubles. — According to Ohm's Law, current is directly proportional to voltage when resistance is constant. Hence, doubling the voltage doubles the current.

Question 1 of 10

What is the relationship between voltage (V), current (I), and resistance (R) according to Ohm's Law?

Ohm's Law states that Voltage equals Current multiplied by Resistance.

Question 2 of 10

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

I = V/R = 12V / 4 Ohms = 3A.

Question 3 of 10

What is the unit of measurement for electrical power?

Power is measured in Watts.

Question 4 of 10

Which of the following formulas correctly calculates power (P)?

Power equals Voltage multiplied by Current (P = V*I).

Question 5 of 10

A resistor has a current of 2A flowing through it and a voltage drop of 10V. What is the power dissipated by the resistor?

P = V * I = 10V * 2A = 20W.

Question 6 of 10

If a device consumes 100W of power and operates at 10V, what is the current flowing through it?

I = P / V = 100W / 10V = 10A.

Question 7 of 10

What is the relationship between power (P), current (I), and resistance (R)?

Power can also be calculated as P = I² * R.

Question 8 of 10

What is the resistance of a 100W lightbulb operating at 120V?

P=V²/R, R = V²/P = 120²/100 = 144?.

Question 9 of 10

A 5-Ohm resistor has 4A flowing through it. What is the power dissipated?

P = I² * R = 4² * 5 = 80W

Question 10 of 10

What happens to the current in a circuit if the voltage is doubled, and the resistance remains constant?

According to Ohm's Law, current is directly proportional to voltage when resistance is constant. Hence, doubling the voltage doubles the current.

Ohm's Law and Power Calculations Mastery Quiz