GATE EE 2025 Set 1 — Question 58
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Electrical & Electronic Measurements → Electrical Quantity Measurement → V, I, Power & Energy
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Question
In an experiment to measure the active power drawn by a single-phase RL Load connected to an AC source through a resistor, three voltmeters are connected as shown in the figure below. The voltmeter readings are as follows: , , . Assuming perfect resistors and ideal voltmeters, the Load-active power measured in this experiment, in W, is ________ (round off to one decimal place).
Correct answer
78 to 81
Solution
The active power in the load can be calculated using the three-voltmeter method formula:Given:
Substituting the values into the formula:The Load-active power is .
Substituting the values into the formula:The Load-active power is .
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