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To determine the size of the halogen bulb for a 22-volt AC transformer with a 120 VA rating, you first calculate the maximum wattage output of the transformer, which is 120 watts (since VA is equivalent to watts for resistive loads). Given the voltage of 22 volts, you can find the appropriate current by using the formula: Power (W) = Voltage (V) × Current (A). Therefore, you can use a halogen bulb rated for 22 volts and up to 120 watts.

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2d ago

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