Question

Object of the experiment
Investigating the effect of the number of bulbs on the resulting brightness using different connections in a circuit

Setup
A series circuit is one in which there is only one pathway for the electric current to follow. The components are arranged one after another in a single pathway. When we connect the components we say that they are connected in series.







A series circuit with one pathway for the current, from the negative to the positive terminal of the battery

Apparatus
• Battery cell(s);
• Bulbs;
• Pieces of insulated copper wire with crocodile clips and
• A switch

Carrying out the experiment
1. Connect the battery (cells), bulb (use one bulb first) and wires as shown in the diagram above.
What happens to the current when the switch is open?

(1)
2. Complete the sentence: When the switch is ___________________, the circuit is

__________________ and the __________________ flows. (3)

3. Connect the battery (cells), bulbs and wires as shown in the diagram above.
Compare the brightness of one bulb with two bulbs when they are connected in series.
What do you observe?



(2)

Justify your answer in question number 3.




(3)

4. Connect the battery (cells), bulbs and wires in a parallel setup.
What do you notice about the brightness of the two bulbs connected in parallel?

Answer 1

Answer:

Explanation:

A series circuit is one in which there is only one pathway for the electric current to follow. The components are arranged one after another in a single pathway. When we connect the components we say that they are connected in series. We have already seen examples of series circuits.