A step-up transformer is connected to a generator that is delivering 131 V and 96 A. The ratio of the turns on the secondary to the turns on the primary is 859 to 1. What voltage is across the secondary? An-swer in units of kV.What current flows in the secondary? Answer in units of mA.
a step up transformer is connected to the generator. therefore the voltage on the primary side of the transformer is 131 volts. secondary turns/primary turns secondary voltage/primary voltage. therefore voltage on secondary side 131*859 112.529KV secondary turns/primary turns primary current/secondary current therefore current on the secondary side 96/859 111.756mA. in order to cross verify, the power on primary side power on the secondary side. i.e 131*96112.529KV*111.756mA.
Vp Voltage Primary Vs Voltage Secondary Np Number of Turns Primary etc The values you have given are primary, why? Because its Generator Transformer (GCSE stuff) Equation : Vp/Vs Np/Ns 131 / Vs 1 / 859 Vs 112529 V (large cause its a step UP transformer) 2). This equation is similar just slight different order: Vp / Vs Is / Ip (Hence you can rearrange this for power but not needed here) 131 / 112529 Is / 96 Is 0.11 A (2dp) Yet again you'd expect it to be small, because your transforming your voltage upwards to reduce your current (which of course creates less heat so less heat energy lost etc)
