Electromagnetism and magnetism

Question 1

Equation for force

Answer 1

Force = magnetic flux density x current x length of conductor in magnetic field

Question 2

Transformer equation 1

Involving number of turns and potential difference

Answer 2

PD across primary coil/PD across secondary coil = number turns on primary coil/number turns on secondary coil

Question 3

Transformer equation 2

Involving current and potential difference

Answer 3

PD across primary coil x current across primary coil = PD across secondary coil x current across secondary coil