Digital Computer Electronics
A combinational logic circuit which is used when it is desired to send data from two or more source through a single transmission line is known as

encoder
decoder
demultiplexer
multiplexer
None of these

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Digital Computer Electronics
A p- channel enhancement type MOSFET performs much the same function as a PNP transistor, except that

it is controlled by current rather than by voltage like a bipolar transistor.
None of these
it is controlled by voltage rather than by current, so that it requires very little current at the control terminal
it is considerably larger
it operates much faster

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