ocr: STEP-UP TRANSFORMER PRIMARY COIL. SECONDARY COIL - LOW HIGH VOLIAGE IRON. VOLIAGE CORE As step-up transtormer has more coils in its secondary coil than its primary ( coiland sO increases the voltage. Step-up transtormers are used to increase the voltage generated - at power stations for transmission along - - powerl lines. This is because high-voltage electricity loses less energy as heat along the way.
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