Download Science 9 Unit 4: Electricity Name - Science 9 Portfolio

TOPIC 7
Definitions
Transformer- An apparatus for reducing
or increasing the voltage of an
alternating current Circuit breaker- An
automatic device for stopping the flow
of current in an electric circuit as a
safety measure
Fuse- An automatic device for stopping
the flow of current in an electric circuit
as a safety measure
Ground wire- A wire drilled into the
ground to prevent buildup of electricity
Digital- is digitally controlled power
products that provide configuration,
monitoring, and supervisory functions
which extends to full loop control
Power- The rate at which electric energy
is converted to other forms
Short circuit- an electrical circuit of
lower resistance than that of a normal
circuit
Assignment:
1. Describe the purpose and location in the power grid of:
a) step-up transformers
Going away form the power plant / increases current
b) step-down transformers
Towards your house / Reduces current
2. What is the difference between a fuse and a circuit breaker?
A fuse can only be used once where as a curciuit breaker can be reset and used again
3. Describe three ways in which electric energy could be conserved with respect to
home lighting.
Turn off lights when you leave
Use lower voltage
Fluorescent bulbs instead of incandescing