Electrical Current

Many electrical devices are used as early warning systems such as burglar alarms, electric fencing systems and many more. Don't you think it will be useful to have an early warning system for rain to warn you to close...

A foxhole radio basically consists of only a coil and a detector. You don't need a crystal diode or batteries to make it work as it is powered only by the radio waves present in the air. In the...

In this science experiment we will be learning more about electrical current, and how electrical circuits are useful to us in our everyday lives. Many electrical devices are used in the security business these days, for example burglar alarms,...

When a flash light is switched on, a simple electrical current is instantly completed as the 'electrons' flow from the batteries through the switch and bulb, and back to the batteries. The 'switch' to get the current flowing, can...

For people to advance in the field of electricity it is very important to learn the difference between two very important concepts in electricity: 'electrical potential' and 'current flow'. This science experiment will help you gain a better understanding...

When electrical components are connected 'in series', it means that they are connected one after another in a chain. A light bulb can be illuminated when a battery is connected in a simple circuit, but only when the circuit...

A 'fuse' is used to prevent an appliance from drawing too much current and is also used in electrical panels to protect the wiring in homes from overheating. Make a simple fuse in the following science experiment to learn...

Battery commercials and ads always boast how their brand is the very best. Surely, these brands cannot all be the best? Some batteries might have the best price, others can have better shelf life and some might provide power...

In the following science experiment, use the solar cell on a solar powered calculator as a light-measuring device to test if two 60W bulbs emit the same amount of light as one 120W bulb.

How would you know which terminal of a battery is positive and which is negative if it were not indicated on the battery? Say for instance you needed to jump start a car, but its battery is so old...