A logic circuit is to be built to control the automatic opening of a window. The window W opens if the temperature T is too high, the heater H is off, and the air conditioning A is off. air conditioning off 0 air conditioning A air conditioning on 1 not too high 0 temperature T too high 1 heater off 0 heater H heater on 1 window closed 0 window W window open 1 Complete the truth table for this problem. A T H W 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1
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Mark scheme
Marking points from the official mark scheme (Oct/Nov 2024). The mark or mark type is shown in brackets.
- 4 marks for 8 correct outputs
- 3 marks for 6/7 correct outputs
- 2 marks for 4/5 correct outputs
- 1 mark for 2/3 correct outputs
- A T H W
- 0 0 0 0
- 0 0 1 0
- 0 1 0 1
- 0 1 1 0
- 1 0 0 0
- 1 0 1 0
- 1 1 0 0
- 1 1 1 0
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