GATE EE
Electrical and Electronics Measurement
Potentiometer and Instrument Transformers
Previous Years Questions

## Marks 1

Instrument transformers are known to introduce magnitude and phase errors in measurements. These are primarily due to
A potentiometer is basically
A transfer instrument employed in the standardization of a polar type $$a.c$$ potentiometer is ______
The primary current in a current transformer is dictated by
In $$d.c.$$ potentiometer measurements, a second reading is often taken after reversing the polarities of the $$s.c.$$ supply and the unknown voltage,...

## Marks 2

A $$200/1$$ current transformer $$(CT)$$ is wound with $$200$$ turns on the secondary on a toroidal core. When it carries a current of $$160$$ $$A$$ o...
A $$50$$ $$Hz,$$ bar primary $$CT$$ has a secondary with $$500$$ turns. The secondary supplies $$5A$$ current into a purely resistive burden of $$1\,\... The core flux in the$$CT$$of above problem under the given operating condition is A$$500A/5A,50Hz$$current transformer has a bar primary. The secondary burden is a pure resistance of$$1\,\Omega $$and it draws... A d.c. potentiometer is designed to measure up to about$$2V$$with a slide wire of$$800$$mm. A standard cell of emf$$1.18V obtains balance ...
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