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Question:

Festival lights are connected by a number of light bulbs connected to the lighting circuit

Festival lights are connected by a number of light bulbs connected to the lighting circuit

Answer:

lighting voltage of 220V, 10 "220V, 15W" series connected to the lighting circuit, the voltage of each bulb is 22V, lower than the rated voltage of the bulb, the bulb will not normally shine. Therefore, B error
When the lighting voltage is 220V, 10 "12V" and "10W" series connected to the lighting circuit, the voltage of each bulb is 22V, over the rated voltage of the bulb, the bulb will be burned out. Therefore, A error
, lighting voltage of 220V, 22 "10V, 2W" series connected to the lighting circuit, the voltage of each bulb is 10V, just for the rated voltage of the bulb, more appropriate. So C is correct

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