Q30.A potential divider circuit is connected with a dc source of 20 V, a light emitting diode of glow in voltage 1.8 V and a zener diode of breakdown voltage of 3.2 V. The length (PR) of the resistive wire is 20 cm. The minimum length of PQ to just glow the LED is _____ cm
What This Question Tests
This question tests the understanding of a potential divider circuit and the specific voltage requirements for an LED to glow, considering the effect of a zener diode as a voltage regulator.
Concepts Tested
Formulas Used
V_out = (R_load / R_total) * V_source
📚 NCERT Sections This Tests
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📋 Question Details
- Chapter
- Semiconductor
- Topic
- Zener Diode and Potential Divider
- Year
- 2024
- Shift
- 08 Apr Shift 2
- Q Number
- Q30
- Type
- Numerical
- NCERT Ref
- Class 12 Physics Ch 14: Semiconductor Electronics: Materials, Devices and Simple Circuits
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