The primary coil of a transformer has N turns and is connected to a 120 V a.c. power line. If the secondary coils has 1 000 turns and a terminal voltage of ...

Answer Details

In a transformer, the ratio of the number of turns in the primary coil to that in the secondary coil is equal to the ratio of the primary voltage to the secondary voltage. This is given by the equation: N1/N2 = V1/V2 where N1 and N2 are the number of turns in the primary and secondary coils, respectively, and V1 and V2 are the voltages across the primary and secondary coils, respectively. In this question, we are given that the primary coil has N turns and is connected to a 120 V AC power line. We are also given that the secondary coil has 1,000 turns and a terminal voltage of 1,200 volts. Using the above equation, we can rearrange it to solve for N1: N1 = (V1/V2) * N2 Substituting the given values, we get: N1 = (120/1200) * 1000 = 100 Therefore, the value of N is 100.