Physics · May / June 2022 · Paper 42 · Question 10
0625
As printed in the paper
The question as text
Fig. 10.1 is a simplified diagram of a digital circuit. The output of logic gate Y controls a buzzer. input A input B logic gate X logic gate Y Fig. 10.1
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10(a)[3]
output of X output of Y
1
0
1
0
0
1
0
0
all column X correct 1, 1, 0, 0
first 2 rows of column Y correct 0, 0
last 2 rows of column Y correct 1, 0
10(b)[1]
high humidity AND dark(ness)
10(c)[3]
relay
low voltage output (of NOR gate/gate Y)
OR small current (in relay coil)
large(r) current provided (by relay)
OR large(r) voltage provided (by relay)
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