MM0474
7.
Crystal rectifiers are used in power measurements because they are rugged
and
A.
Are not temperature sensitive.
B.
Require a minimum of auxiliary equipment.
C.
Do not require calibration.
8.
How should a bolometric device be placed in a circuit when measuring the
change in resistance?
A.
In parallel with the measuring device.
B.
In series with the measuring device.
C.
In one arm of a Wheatstone bridge.
9.
Which
method
of
bolometric
power
measurements
is
more
reliable
and
precise?
A.
Balanced bridge.
B.
Unbalanced bridge.
C.
Direct.
10.
What is the advantage of an unbalanced bridge method of measurement?
A.
The bridge is continuously calibrated.
B.
Ease of operation.
C.
Can be used at DC or low frequency.
8
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