Table of Contents

- 1 How does the total resistance compare to the individual resistances of each light bulb?
- 2 What happens to the total resistance in a series circuit as you add more resistance?
- 3 What happens to the current in a series circuit when you add more bulbs?
- 4 How do you find total resistance in a series circuit?

## How does the total resistance compare to the individual resistances of each light bulb?

The total resistance in the circuit is equal to the sum of the individual resistances, since the current has to pass through each resistor in sequence through the circuit.

**How does adding bulbs in series affect the resistance of the circuit?**

The resistance increases. In a series circuit, adding bulbs increases the resistance in the circuit. What changes occur in the current in the circuit as more bulbs are added? Increasing the resistance decreases the current.

**What happens to the total resistance in a series circuit?**

In a series circuit, the total resistance across all of the components (the ‘net resistance’) increases as more components are added. The two resistors have the same current through them. The potential difference across them will be different if they have different resistances.

### What happens to the total resistance in a series circuit as you add more resistance?

In a series circuit, adding more resistors increases total resistance and thus lowers current. But the opposite is true in a parallel circuit because adding more resistors in parallel creates more choices and lowers total resistance.

**In what circuit is the total resistance greater than the largest resistance in the circuit?**

Explanation: In series circuits, the total resistance is the sum of all the resistance in the circuit, hence the total is greater than the largest resistance.

**What happens in a series circuit when more bulbs are added?**

As more and more light bulbs are added, the brightness of each bulb gradually decreases. This observation is an indicator that the current within the circuit is decreasing. So for series circuits, as more resistors are added the overall current within the circuit decreases.

#### What happens to the current in a series circuit when you add more bulbs?

If more light bulbs or other resistors are placed in a series circuit, there is more resistance in the circuit, and so the current, and the brightness of the lamps would be reduced.

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

The total resistance of a number of resistors in series is equal to the sum of all the individual resistances. In this circuit the following applies. Adding components in series increases the total resistance in a circuit.

**How do you find the total resistance of a circuit?**

If you know the total current and the voltage across the whole circuit, you can find the total resistance using Ohm’s Law: R = V / I. For example, a parallel circuit has a voltage of 9 volts and total current of 3 amps.

## How do you find total resistance in a series circuit?

“2. The total resistance of a series circuit is equal to the sum of individual resistances.”

- RT = R1 + R2 + R3.
- 2 + 2 + 3 = 7 Ohms.
- R total is 7 Ohms.

**How do you calculate the total resistance in a circuit with parallel and series resistors connected?**

To calculate the total overall resistance of a number of resistors connected in this way you add up the individual resistances. This is done using the following formula: Rtotal = R1 + R2 +R3 and so on.