The circuit diagram is for a fan dryer that blows either hot air of cold air. Both switches R and S are as shown often. Which switch (s) is/are to be closed to obtain either hot or cold air?

In this circuit if we want Hot air to come out of the hair dryer then we will have to close both the switches R and S.


If we want cold air then we need to close the switch S. This will cause only the fan to work and the heater will be OFF ans thus we’ll get cold air as an output.


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