Electric charge

To revise the basic concepts for charge and electricity.
What PN are the two types of electric charge?. What N is at the centre of an atom?. What E are orbiting nucleus?. What N is the charge electrons have?. What P is the charge nucleus has?. What D is the current whose direction and size not changing?. What C is the unit of charge?. What C is the flow of charge?. What V is the driving force for flowing of charge in circuit?. What R is to impede the flowing of charge in circuit?. What A is the unit for current?. What V is the unit for voltage?. What A is the device to measure current?. What V is the device to measure voltage?. What O is the unit for resistance?. What OL is a statement of the relationship between current, voltage and resistance?. What A happens when unlike charges approach each other?. What R happens when like charges approach each other?. What I is the particle if an atom loses or gains electrons?. What M are the material most often used for conduct electricity?.

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