JEE Main 2026 · 4 Apr · Shift 2 · Physics Q46

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PhysicsInteger+4 / -1Question 46 of 75

A diode has Zener voltage of 10 V and maximum power dissipation of 0.5 W, then the minimum resistance to be used in series with this diode for safety when it is connected to a 25 V power supply is ________ Ω.

Your answer

Answer and worked solution

Official answer: 300

Maximum Zener current. $I_{\max}=\frac{0.5}{10}=0.05$ A.

Series resistor. $R_{\min}=\frac{25-10}{0.05}=300$ Ω.

Answer: 300

Topics:Special diodes (LED, Zener, photodiode, solar cell)

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JEE Main 2026 · 4 Apr · Shift 2, Physics question 46