A student designed a transformer to provide current to an electric bell marked 24W,6V from mains supply of 240V. He wound coils 50 turns and N turns on an iron ring. When he connected the coil of 50 turns to the bell and N turns to the a.c source he found out that the transformer was only 60% efficient. Find;
- The value of N
- The power in the primary coil.
- State two ways in which the efficiency of the transformer can be increased.
- State and explain two factors that determine the magnitude of induced emf in a coil rotating in a magnetic field.