GATE EE 2021 Set 1 — Question 60
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Electric Circuits → Network Elements & Sources → Mutual Inductance & Dot Convention
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Question
An air-core radio-frequency transformer as shown has a primary winding and a secondary winding. The mutual inductance between the windings of the transformer is ________ . (Round off to 2 decimal places.)
Correct answer
50 to 52
Solution
From the circuit diagram:
- Frequency . Angular frequency .
- The primary current is determined by the voltage across the resistor: .
- Assuming the secondary is open-circuited, the voltage across the secondary winding is the mutually induced EMF: .
- Solving for :
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