Using electricity 🚩 ⭐👍
Variables that affect brightness of bulb
arrangement of batteries
number of bulbs
when positive and negative ends connect, it is series
number of batteries
more batteries in series, bulbs in circuit shine more brightly
When too much batteries, bulb might blow
When more bulbs added in parallel, brightness will remain the same
Batteries in Parallel
Why should we use electricity safely
Electricity can be dangerous
Can cause fire or electric shocks
Causes can be using it with wet hands, handling damaged insulation, or overloading powerpoints
To use it safely, we have to...
Do not connect too many appliances into one socket
make sure wires not exposed
never touch with wet hands
Use circuit breakers or fuses
Do not repair appliances yourself
How to use electricity wisely
To conserve electricity
Electricity is made from natural resources such as coal, oil and natural gas.
The faster we use them, the faster it will run out
We save money by conserving electricity
turn off appliances when not in use
arrangement of bulbs
When one bulb blows, others will not work
Batteries in series
Torch or Radio
requires less power to function
when positive and positive ends connect and negative and negative ends connect, it is parallel
Comparison Table
When more bulbs added in series, bulbs will turn darker
Comparison Table for Bulbs in parallel and in series
More batteries in parallel, bulb would not shine brighter nor darker
Use energy-saving bulbs
Sleep with lights off
refrigerator door must be close after opening it ⚠
Use fan instead of AC