Final answer:
Electric shocks can be prevented by grounding the case of the plug and using safety devices like ground fault interrupters and isolation transformers. Following electrical safety practices is also important.
Step-by-step explanation:
Electric shocks can be prevented if someone touches the case of the plug by grounding the case. When the case is grounded, any induced voltage on the case is kept near zero, reducing the risk of electric shock. To ground the case, it should be connected to a wire that goes into the ground, such as a ground wire or a metal water pipe.
In addition to grounding, there are other safety devices that can prevent electric shocks. A ground fault interrupter (GFI) detects the loss of current to unintentional paths and quickly shuts off the power to prevent electric shocks. An isolation transformer is another device that insulates the device being powered from the original source, protecting against electric shocks.
It is important to follow proper electrical safety practices, such as using grounded outlets, not overloading circuits, and seeking professional help for any electrical repairs or installations.
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