Electrical Engineering
GATE EE concept:current PYQs
Build your understanding with focused practice from past exam papers.
How to practice concept:current
Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.
Questions 1–5 of 5. Imported answers require independent review unless marked reviewed.
Question 23
Open questionEEMCQ1 markNeeds review
The table lists two instrument transformers and their features:
Instrument Transformers | Features |
|---|---|
| P) Primary is connected in parallel to the grid |
X) Current Transformer (CT) | Q) Open circuited secondary is not desirable |
Y) Potential Transformer (PT) | R) Primary current is the line current |
| S) Secondary burden affects the primary current |
The correct matching of the two columns is
Your answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 39
Open questionEEMCQ2 marksNeeds review
A 3-phase, star-connected, balanced load is supplied from a 3-phase, 400 V (rms), balanced voltage source with phase sequence R-Y-B, as shown in the figure. If the wattmeter reading is −400 W and the line current is
A (rms), then the power factor of the load per phase is
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 52
Open questionEENAT2 marksNeeds review
A non-ideal Si-based pn junction diode is tested by sweeping the bias applied across its terminals from −5 V to +5 V. The effective thermal voltage,
, for the diode is measured to be
mV. The resolution of the voltage source in the measurement range is 1 mV. The percentage uncertainty (rounded off to 2 decimal places) in the measured current at a bias voltage of 0.02 V is ______.Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 23
Open questionEENAT1 markNeeds review
The total impedance of the secondary winding, leads, and burden of a 5 A CT is 0.01
. If the fault current is 20 times the rated primary current of the CT, the VA output of the CT is __________.Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 32
Open questionEEMCQ2 marksNeeds review
A moving coil instrument having a resistance of 10
, gives a full-scale deflection when the current is 10 mA. What should be the value of the series resistance, so that it can be used as a voltmeter for measuring potential difference up to 100 V?Your answerChoose one option.
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