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A student wants to determine the input power and the output power of a transformer.The transformer has a variable resistor connected across the output.Out Draw, on Figure 4, a circuit that the student can use. The circuit symbol for a step-up transformer is provided for you in Figure 4.

The student wants to investigate the variation of the transformer's efficiency with output power. The input voltage is fixed at 6.0 V rms. Describe a suitable procedure for this investigation using the circuit that you have drawn in Figure 4. ●how the output power of the transformer is varied ●the measurements made and the types of meters used the procedure needed to ensure the accuracy of the measurements how the data are analysed. F

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