-- card: 55423 from stack: in
-- bmap block id: 0
-- flags: 4000
-- background id: 7720
-- name: #183
----- HyperTalk script -----
on openCard
  global group,rightone
  put 19 into group
  put "A" into rightone
  pass openCard
end openCard



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Question #19

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4BE-1.6 What is an "optoisolator"?

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An LED and phototransistor

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A P-N junction that develops an excess positive charge when exposed to light

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An LED and a capacitor

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An LED and a solar cell

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Correct answer is A