Physics · Oct / Nov 2017 · Paper 21 · Question 6
5054
As printed in the paper
Show the answer and mark scheme
6(either)(a)[2]
(high) positive potential very low gas pressure or heat filament continuously / filament must remain hot
6(either)(b)[2]
determine distance / number of squares between pulses multiply by time-base setting or multiply by number of ms / div
6(or)(a)[1]
[Diagram in the mark scheme] the NAND gate symbol: an AND-gate shape (flat input side, rounded output side) with a small circle at the output
6(or)(b)(i)[1]
(the NAND gate has a) power supply / battery or it is an active device
6(or)(b)(ii)[2]
inputs output 0 0 1 0 1 1 1 0 1 inputs output 1 1 0
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