An ideal efficient transformer has a primary power input o has a primary power input of 10kW. The secondary current when the tary: secondary turns ratio is 8:1, then the potential difference applied to the primary coil is
O 10⁴x8²/25 V
O 10⁴x8/25 V
O 10⁴/25x8 V
O 10⁴/25x8² V