GATE EE 2024 Set 1 — Question 60
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Analog & Digital Electronics → Diode Circuits → P-N Junction Diode
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Question
In the given circuit, the diodes are ideal. The current through the diode in milliamperes is ___________ (rounded off to two decimal places).
Correct answer
1.64 to 1.7
Solution
Assume both diodes and are in the ON state. Since they are ideal, the voltage drop across them is zero.
Let be the voltage at the node between the two resistors on the left. Since is ON, this node is connected to the node between and the resistor. Let's call the voltage at the cathode of as . Since is ON, .
Applying KCL at node :
.
Now, apply KCL at node to find the current through :
.
Check assumptions:
Let be the voltage at the node between the two resistors on the left. Since is ON, this node is connected to the node between and the resistor. Let's call the voltage at the cathode of as . Since is ON, .
Applying KCL at node :
.
Now, apply KCL at node to find the current through :
.
Check assumptions:
1.Current through is (ON assumption valid).
2.Current through is (ON assumption valid).
Thus, the current is .Continue learning with Success Tracker
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