Electric circuit is used by electrons from a current source or voltage power.
To prevent the danger of electrical shock and the possibility of electrocution, ground fault interrupts devices detect open circuits to earth ground in attached electrical or electronic devices.
The user of the device could become a part of the devices electrical circuit by providing a return path for the electrons through the users body instead of the circuits earth ground. When our body becomes part of an electrical circuit, the user can be seriously shocked, or even killed by electrocution.
Therefore students can have difficulty grasping the ideas and principles involved and constructing understanding. Misconceptions may develop, with students believing electricity is a substance which gets used up. Understanding of electricity involves students acquiring a specialised specific set of vocabulary. However, although we cannot see electrical charges moving and transferring energy, the effect of the transfer can be seen.
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