# Can induction coils heat air?

I understand that induction coils can heat up conductive materials such as metals, but I'm wondering if they can heat up normal air. And if they cannot, can ionizing the air beforehand allow it to be heated through induction?

• Tokamaks (those machines for hydrogen fusion) can heat plasmas by induction. (As far as I remember, I am not a plasma physicist.) – Pieter Mar 29 '17 at 23:08
• Any ions of the air will be accelerated. The coil by itself gets warm by the oscillating back and forth electrons. Furthermore the involved electrons radiate due to their movement in circles EM radiation. Through heat convection an EM radiation all this effects heat (a tiny bit) the air. – HolgerFiedler Mar 30 '17 at 6:11

• There's a $400,000\ V$ potential difference between the top of the atmosphere and the Earth. The top of the atmosphere is positively charged and can be consider conductive. The Earth is negatively charged. There's $200\ V$ potential difference between your feet and your head. You don't notice it because you're grounded. And both water an ozone have permanent electric and magnetic dipoles. – Cinaed Simson Jun 23 at 4:17