Daily review: Ohm’s Law Quiz Practice Quiz | Daily…

Q: According to Ohm’s Law, how does current change if the resistance of a circuit is doubled while the voltage remains constant?

It is halved — Since I = V/R, if R is doubled (2R), the current I becomes I/2, which is half of the original current.

Q: What is the voltage across a 10-ohm resistor if a 0.5-ampere current flows through it?

5 Volts — Using V = I * R, we have V = 0.5 A * 10 ? = 5 V.

Q: Which of the following units is equivalent to the Volt in terms of Ohm's Law?

Ampere * Ohm — From V = IR, the unit Volt is equal to the product of Amperes and Ohms (A * ?).

Q: If the voltage across a conductor is tripled, what happens to the current, assuming resistance stays constant?

It triples — Ohm's Law states I = V/R. If V becomes 3V, then I = 3V/R, meaning the current triples.

Q: Calculate the resistance of a circuit that draws 2 Amps from a 12-Volt battery.

6 Ohms — R = V / I. Therefore, R = 12 V / 2 A = 6 ?.

Q: Ohm’s Law applies directly to which of the following?

Ohmic resistors at constant temperature — Ohm's Law holds strictly for materials (Ohmic) where resistance remains constant, typically requiring a constant temperature.

Q: What is the current in a circuit with 120V and 240 ohms of resistance?

0.5 Amps — I = V / R = 120 V / 240 ? = 0.5 A.

Q: In a V-I graph where Voltage is on the y-axis and Current is on the x-axis, what does the slope represent?

Resistance — The slope of a V-I graph is ?V/?I, which is the definition of Resistance (R).

Q: A resistor has a color code indicating 100 ohms. If 10 Volts are applied, what is the current?

0.1 A — I = V / R = 10 V / 100 ? = 0.1 A.

Q: Why does the temperature of a resistor affect the validity of Ohm's Law?

Resistance changes with temperature — Most materials change their resistance as they heat up, making them non-ohmic if the temperature is not kept constant.

Question 1 of 10

According to Ohm’s Law, how does current change if the resistance of a circuit is doubled while the voltage remains constant?

Since I = V/R, if R is doubled (2R), the current I becomes I/2, which is half of the original current.

Question 2 of 10

What is the voltage across a 10-ohm resistor if a 0.5-ampere current flows through it?

Using V = I * R, we have V = 0.5 A * 10 ? = 5 V.

Question 3 of 10

Which of the following units is equivalent to the Volt in terms of Ohm's Law?

From V = IR, the unit Volt is equal to the product of Amperes and Ohms (A * ?).

Question 4 of 10

If the voltage across a conductor is tripled, what happens to the current, assuming resistance stays constant?

Ohm's Law states I = V/R. If V becomes 3V, then I = 3V/R, meaning the current triples.

Question 5 of 10

Calculate the resistance of a circuit that draws 2 Amps from a 12-Volt battery.

R = V / I. Therefore, R = 12 V / 2 A = 6 ?.

Question 6 of 10

Ohm’s Law applies directly to which of the following?

Ohm's Law holds strictly for materials (Ohmic) where resistance remains constant, typically requiring a constant temperature.

Question 7 of 10

What is the current in a circuit with 120V and 240 ohms of resistance?

I = V / R = 120 V / 240 ? = 0.5 A.

Question 8 of 10

In a V-I graph where Voltage is on the y-axis and Current is on the x-axis, what does the slope represent?

The slope of a V-I graph is ?V/?I, which is the definition of Resistance (R).

Question 9 of 10

A resistor has a color code indicating 100 ohms. If 10 Volts are applied, what is the current?

I = V / R = 10 V / 100 ? = 0.1 A.

Question 10 of 10

Why does the temperature of a resistor affect the validity of Ohm's Law?

Most materials change their resistance as they heat up, making them non-ohmic if the temperature is not kept constant.

Daily review: Ohm’s Law Quiz