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Question

In ______ schemes, the voltages are on the both sides of the time axis. For example, the voltage level for 0 can be positive and the voltage level for 1 can be negative.

a.

polar

b.

bipolar

c.

unipolar

d.

all of the above

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Answer: (a).polar

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Q. In ______ schemes, the voltages are on the both sides of the time axis. For example, the voltage level for 0 can be positive and the voltage level for 1 can be negative.

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