Blog | Voltage Lab

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

V = IR Ohm's Law states that Voltage (V) equals Current (I) multiplied by Resistance (R).

Q: What does 'V' represent in Ohm's Law?

Voltage V represents Voltage, measured in Volts.

Q: What unit is used to measure current (I)?

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

Q: What unit is used to measure resistance (R)?

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

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

3 A Using I = V/R, I = 12V / 4? = 3A.

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

20 V Using V = IR, V = 2A * 10? = 20V.

Q: If a circuit has a voltage of 6V and a current of 3A, what is the resistance?

2 ? Using R = V/I, R = 6V / 3A = 2?.

Q: What is the relationship between voltage and current in a circuit with a fixed resistance?

Directly proportional Voltage and current are directly proportional (V ? I) in a fixed resistance.

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

It doubles I = V/R, so doubling V doubles I if R is constant.

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

It halves I = V/R, so doubling R halves I if V is constant.

Question 1 of 15

What is the formula for Ohm's Law?

Ohm's Law states that Voltage (V) equals Current (I) multiplied by Resistance (R).

Question 2 of 15

What does 'V' represent in Ohm's Law?

V represents Voltage, measured in Volts.

Question 3 of 15

What unit is used to measure current (I)?

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

Question 4 of 15

What unit is used to measure resistance (R)?

Resistance is measured in Ohms (?).

Question 5 of 15

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

Using I = V/R, I = 12V / 4? = 3A.

Question 6 of 15

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

Using V = IR, V = 2A * 10? = 20V.

Question 7 of 15

If a circuit has a voltage of 6V and a current of 3A, what is the resistance?

Using R = V/I, R = 6V / 3A = 2?.

Question 8 of 15

What is the relationship between voltage and current in a circuit with a fixed resistance?

Voltage and current are directly proportional (V ? I) in a fixed resistance.

Question 9 of 15

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

I = V/R, so doubling V doubles I if R is constant.

Question 10 of 15

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

I = V/R, so doubling R halves I if V is constant.

Question 11 of 15

Which of the following is NOT a form of Ohm's Law?

P=VI represents power, not Ohm's law. The other options are rearrangements of V=IR.

Question 12 of 15

Ohm's Law primarily applies to:

Ohm's Law is primarily used to analyze the behavior of resistors.

Question 13 of 15

If a resistor's color code indicates a resistance of 1000 ohms, how is this typically represented?

1000 ohms is equal to 1 kilohm, represented as 1 k?.

Question 14 of 15

What type of circuit is Ohm's law most directly applied to?

Ohm's Law is most readily applied to DC (Direct Current) circuits.

Question 15 of 15

In a series circuit, if the voltage across one resistor is 5V and the total current is 2A, what is the resistance of that resistor?

Using R = V/I, R = 5V / 2A = 2.5?.

Voltage Lab

ohm's law Quiz