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1
GATE EE 2024
MCQ (Single Correct Answer)
+1
-0.33

The table lists two instrument transformers and their features:

Instrument TransformersFeatures
X) Current Transformer (CT)P) Primary is connected in parallel to the grid
Y) Potential Transformer (PT)Q) Open circuited secondary is not desirable
R) Primary current is the line current
S) Secondary burden affects the primary current

The correct matching of the two columns is

A

X matches with P and Q; Y matches with R and S.

B

X matches with P and R; Y matches with Q and S.

C

X matches with Q and R; Y matches with P and S.

D

X matches with Q and S; Y matches with P and R.

2
GATE EE 2000
MCQ (Single Correct Answer)
+1
-0.3
Instrument transformers are known to introduce magnitude and phase errors in measurements. These are primarily due to
A
improper connections on the primary side
B
measurement errors inherent in the meter connected to the transformer secondary
C
open and short circuit parameters of the instrument transformers
D
none
3
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
4
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
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