Photocurrent vs collector potential for different intensitiesविभिन्न तीव्रताओं के लिए प्रकाश-विद्युत धारा बनाम संग्राहक विभवPhotocurrent vs collector potential for different intensities

NCERT Fig 11.3 · Class 12 Physics · Chapter 11 · interactive diagram

Parts and what they mean

• Intensity I₁ (lowest) (तीव्रता I₁ (न्यूनतम)) — Fewest photoelectrons per second, so the lowest saturation current.
• Intensity I₂ (तीव्रता I₂) — Medium intensity: medium saturation current, same stopping potential.
• Intensity I₃ (highest) (तीव्रता I₃ (अधिकतम)) — Most photoelectrons per second, so the highest saturation current.
• Stopping potential −V0 (निरोधी विभव −V0) — The same for all three intensities: V0 (and Kmax = eV0) does not depend on intensity.
• Saturation current (संतृप्त धारा) — Reached when all emitted photoelectrons reach A; proportional to intensity.
• Retarding (negative) potential on A (A पर मंदक (ऋणात्मक) विभव) — A is negative w.r.t. C: electrons are repelled; only the more energetic ones reach A.
• Accelerating (positive) potential on A (A पर त्वरक (धनात्मक) विभव) — A is positive w.r.t. C: electrons are attracted; current rises and then saturates.
• Collector plate potential (संग्राहक प्लेट विभव) — Potential of A with respect to C.
• Photocurrent (प्रकाश-विद्युत धारा) — Measured by the microammeter.

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 11.3. Report a mistake