Electrical Circuits

What is Ohm's Law?

• Ohm's Law is the relationship between current and voltage.

• Ohm's Law states that resistance is directly proportional to voltage.

• Ohm's Law relates current, voltage, and resistance.

• Ohm's Law only applies to direct current circuits.

State Ohm's Law equation.

• V = I + R

• V = I / R

• V = I^R

• V = I * R

What is the unit of resistance?

• ohm

• watt

• ampere

• volt

What happens to the total resistance when resistors are connected in series?

• The total resistance increases.

• The total resistance remains the same.

• The total resistance becomes zero.

• The total resistance decreases.

How do you calculate the total resistance of resistors in series?

• Add up the resistance values

• Subtract the resistance values

• Divide the resistance values

• Multiply the resistance values

What happens to the total resistance when resistors are connected in parallel?

• decreases

• increases

• stays the same

• becomes negative

How do you calculate the total resistance of resistors in parallel?

• RTotal = R1 - R2 - R3 - ... - Rn

• 1/RTotal = 1/R1 + 1/R2 + 1/R3 + ... + 1/Rn

• RTotal = R1 * R2 * R3 * ... * Rn

• RTotal = R1 + R2 + R3 + ... + Rn

What is the equivalent resistance of two resistors in series with resistances 4 ohms and 6 ohms?

• 14

• 2

• 10

• 24

What is the equivalent resistance of two resistors in parallel with resistances 3 ohms and 5 ohms?

• 2/3

• 8/15

• 15/8

• 1/2

A circuit has three resistors connected in series with resistances 2 ohms, 3 ohms, and 4 ohms. Calculate the total resistance.

• 5

• 9

• 6

• 7