Although the wires of the primary are not physically connected to the wires of the secondary, a current flows in the secondary if an alternating current flows in the primary. If the primary has \(100\...Although the wires of the primary are not physically connected to the wires of the secondary, a current flows in the secondary if an alternating current flows in the primary. If the primary has 100 loops and the secondary 10 loops the voltage in the secondary will be 1/10 of the voltage in the primary but the current in the secondary will be 10 times that of the primary.