Question

part 1: multiple choice (circle the correct answer)

1. electricity is the flow of:

a) neutrons
b) protons
c) electrons
d) photons

1. which of the following is a series circuit?

a) a power strip with multiple outlets
b) a string of old christmas lights where one bulb goes out and all bulbs go out
c) household wiring
d) a parallel battery setup

1. a short circuit is dangerous because:

a) it increases resistance
b) it creates an unintended path for electricity that can cause sparks or fires
c) it makes circuits more efficient
d) it prevents electricity from flowing

1. in a parallel circuit:

a) if one device stops working, all others stop too
b) each path works independently
c) electricity flows through only one path
d) it cannot be used in homes

Explanation:

Question 1

Electricity is defined as the flow of electric charge. Electrons are negatively charged particles that move, while neutrons have no charge, protons are positively charged and mostly stay in the nucleus, and photons are related to light energy. So the flow of electrons constitutes electricity.

In a series circuit, components are connected in a single path, so if one component fails (like a bulb in old Christmas lights), the entire circuit is broken and all components stop working. A power strip, household wiring, and parallel battery setup are examples of parallel circuits or have parallel - like characteristics where components can work independently.

A short circuit occurs when there is an unintended low - resistance path for electricity. This causes a large amount of current to flow, which can generate heat, sparks, and potentially start fires. It does not increase resistance (it decreases it), it is not more efficient (it's a fault), and it does not prevent electricity from flowing (it allows too much to flow).

Answer:

c) Electrons

Question 2