1
GATE EE 1997
MCQ (Single Correct Answer)
+1
-0.3
A potentiometer is basically
A
Deflection type instrument
B
Null type instrument
C
Deflection as well as null
D
A digital instrument
2
GATE EE 1997
MCQ (Single Correct Answer)
+1
-0.3
A transfer instrument employed in the standardization of a polar type $$a.c$$ potentiometer is ______
A
an electro static instrument
B
a thermal instrument
C
a dynamo meter instrument
D
a moving coil instrument
3
GATE EE 1997
MCQ (Single Correct Answer)
+1
-0.3
The primary current in a current transformer is dictated by
A
the secondary burden
B
The core of the transformer
C
the load current
D
none of the above
4
GATE EE 1992
MCQ (Single Correct Answer)
+1
-0.3
In $$d.c.$$ potentiometer measurements, a second reading is often taken after reversing the polarities of the $$s.c.$$ supply and the unknown voltage, and the average of the two readings is taken. This is, with a view to eliminate the effects of
A
Ripples in the $$d.c.$$ supply
B
Stray magnetic fields
C
Stray thermal emf's
D
Erroneous standardization
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