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Logic Gates

Q1: A logic probe is placed on the output of a gate and the display indicator is dim. A pulser is used on each of the input terminals, but the output indication does not change. What is wrong?

A The dim indication on the logic probe indicates that the supply voltage is probably low.

B The output of the gate appears to be open.

C The dim indication is the result of a bad ground connection on the logic probe.

D The gate is a tristate device.

ANS:B - The output of the gate appears to be open.

Sometime supply problem occurred or properly connection is not in circuits or gate output is not properly connecting to.



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