Physics gcse question on electro magnetsWatch
7.2 Use the formula N_p/N_s = V_p/V_s. Make sure you know which is part of the primary coil and which is part of the secondary coil (read question carefully).
7.3 Imagine the free moving electrons in the coil. Now those tiny charged particles will cut magnetic field lines (where?) when you turn the coil. What happens next?