Physics – 4.5.6 The transformer | e-Consult
4.5.6 The transformer (1 questions)
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A step-down transformer reduces the voltage of an alternating current (AC) supply. It does this by having more turns in the primary coil than in the secondary coil. The voltage in the secondary coil is lower than the voltage in the primary coil.
A common example of a step-down transformer is used in household appliances like phone chargers and laptop chargers. These devices often require a lower voltage than the mains supply (e.g., 230V in the UK). The transformer steps down the voltage to a safe level for the appliance to operate.
| Function: Reduces voltage. |
| Primary Coil Turns: More than Secondary Coil Turns. |
| Secondary Coil Turns: Fewer than Primary Coil Turns. |
| Common Use: Household appliances (chargers). |