If you are an EE you definitely know the answer to this, or at least you think you do. If you said positive to negative, you are wrong. Then you remember that current flow is a charge of electrons ...

Key learning points Electrical charges What are free electrons? Cell polarity Conventional current direction Electrons orbit the nucleus. An atom has a neutral charge, because it contains the same ...

You turn on a switch and the light switches on because electricity 'flows'. The usual perception is that this is like opening a faucet and the water starts to flow. But this analogy is misleading. The ...

Electrons in graphene can act like a perfect fluid, defying established physical laws. This finding advances both fundamental ...