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Electricity and Circuits
Quick questions on Static electricity and current: N(A)-Level Physics electricity
3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is electric charge?Show answer
There are two kinds of electric charge, positive and negative. An atom normally has equal positive charge (in the nucleus) and negative charge (the electrons), so it is neutral. Electrons can be moved from one object to another, and this is what creates charge.
What are forces between charges?Show answer
Charged objects exert forces on each other:
What is electric current?Show answer
An electric current is the rate of flow of electric charge around a circuit. In a metal wire the current is a flow of electrons. Current is measured in amperes (amps, ) using an ammeter connected in the circuit.
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