26 Use the information and diagram to answer the following question. A Physics student builds a circuit as shown with the help of a battery, wires,switch and 2 light bulbs as shown. Which of the following circuit elements should the s student use to cause the bulbs to dim but not go out? A B C D

## Step 1: This question is about understanding the basic principles of electric circuits and how different components such as switches, batteries, and bulbs function within a circuit. In this case, the student wants to make the bulbs dim but not go out completely. ## Step 2: To achieve this, the student needs to increase the resistance in the circuit. Resistance is the opposition to the flow of electric current. By increasing the resistance, the amount of current flowing through the circuit will decrease, causing the bulbs to dim. ## Step 3: Looking at the options provided, we can see that option (A) represents a resistor, which is a component that adds resistance to an electrical circuit. Therefore, adding a resistor to the circuit will increase the resistance, thus reducing the current and causing the bulbs to dim.### The formula that explains this is Ohm's law: , where is the voltage, is the current, and is the resistance. If the resistance increases while the voltage remains constant, the current must decrease.