When resistors are connected in series, they are connected one after another. If any one
of them does not function, the circuit breaks and there is no flow of electricity. If two
bulbs are connected in series, they will both give less light than if they had been connected
individually. If three bulbs are connected in series, their light output will decrease further. Think
about it. What is the reason behind this?
(5 marks)
Answers
Explanation:
Two Types of Connections
Circuit Symbols and Circuit Diagrams
Two Types of Connections
Series Circuits
Parallel Circuits
Combination Circuits
When there are two or more electrical devices present in a circuit with an energy source, there are a couple of basic means by which to connect them. They can be connected in series or connected in parallel. Suppose that there are three light bulbs connected together in the same circuit. If connected in series, then they are connected in such a way that an individual charge would pass through each one of the light bulbs in consecutive fashion. When in series, charge passes through every light bulb. If connected in parallel, a single charge passing through the external circuit would only pass through one of the light bulbs. The light bulbs are placed within a separate branch line, and a charge traversing the external circuit will pass through only one of the branches during its path back to the low potential terminal. The means by which the resistors are connected will have a major effect upon the overall resistance of the circuit, the total current in the circuit, and the current in each resistor. In Lesson 4, we will explore the effect of the type of connection upon the overall current and resistance of the circuit.
A common physics lab activity involves constructing both types of circuits with bulbs connected in series and bulbs connected in parallel. A comparison and contrast is made between the two circuits.

The main questions of concern in a lab activity such as this are typically the following:
As the number of resistors (light bulbs) increases, what happens to the overall current within the circuit?
As the number of resistors (light bulbs) increases, what happens to the overall resistance within the circuit?
If one of the resistors is turned off (i.e., a light bulb goes out), what happens to the other resistors (light bulbs) in the circuit? Do they remain on (i.e., lit)?
Answer:
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