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The cathode of a photoelectric cell is changedsuch that the work function changes from W1 toW2 (W2 > W1). If the current before and afterchanges are I1 and I2, all other conditionsremaining unchanged, then (assuming hν > W2)[1992]
- a)I1 = I2
- b)I1 < I2
- c)I1 > I2
- d)I1 < I2 < 2 I1
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
The cathode of a photoelectric cell is changedsuch that the work funct...
The work function has no effect on
photoelectric current so long as hv > W0.
The photoelectric current is proportional to
the intensity of incident light. Since there is
no change in the intensity of light, hence I1
= I2.
photoelectric current so long as hv > W0.
The photoelectric current is proportional to
the intensity of incident light. Since there is
no change in the intensity of light, hence I1
= I2.
Most Upvoted Answer
The cathode of a photoelectric cell is changedsuch that the work funct...
Understanding the Photoelectric Effect
The photoelectric effect demonstrates how light can eject electrons from a material, which is influenced by the material's work function (W). The work function is the minimum energy required to release an electron.
Initial Conditions
- Before the change, we have a work function W1 and a current I1.
- Electrons are ejected when photons with energy (hν) greater than W1 strike the cathode.
Change in Work Function
- After changing the cathode, the work function is W2 (where W2 > W1).
- The current now is I2, and we assume hν > W2, meaning electrons can still be ejected.
Current Analysis
- Current (I) in a photoelectric cell is directly proportional to the number of photoelectrons emitted.
- Although W2 is higher, hν remains sufficiently greater than W2, allowing electrons to be emitted.
Comparing I1 and I2
- Since the energy of the incoming photons still exceeds the new work function W2, electrons are still emitted.
- The number of emitted electrons (and thus the current) does not decrease due to the increased work function, as long as hν remains sufficiently high.
Conclusion
- Therefore, the current I2 remains equal to I1, making the correct answer option 'A': I1 = I2.
- The change in work function does not affect current as long as the energy of incoming photons is adequate to overcome the new work function.
The photoelectric effect demonstrates how light can eject electrons from a material, which is influenced by the material's work function (W). The work function is the minimum energy required to release an electron.
Initial Conditions
- Before the change, we have a work function W1 and a current I1.
- Electrons are ejected when photons with energy (hν) greater than W1 strike the cathode.
Change in Work Function
- After changing the cathode, the work function is W2 (where W2 > W1).
- The current now is I2, and we assume hν > W2, meaning electrons can still be ejected.
Current Analysis
- Current (I) in a photoelectric cell is directly proportional to the number of photoelectrons emitted.
- Although W2 is higher, hν remains sufficiently greater than W2, allowing electrons to be emitted.
Comparing I1 and I2
- Since the energy of the incoming photons still exceeds the new work function W2, electrons are still emitted.
- The number of emitted electrons (and thus the current) does not decrease due to the increased work function, as long as hν remains sufficiently high.
Conclusion
- Therefore, the current I2 remains equal to I1, making the correct answer option 'A': I1 = I2.
- The change in work function does not affect current as long as the energy of incoming photons is adequate to overcome the new work function.
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The cathode of a photoelectric cell is changedsuch that the work function changes from W1 toW2 (W2 > W1). If the current before and afterchanges are I1 and I2, all other conditionsremaining unchanged, then (assuming hν> W2)[1992]a)I1 = I2b)I1 < I2c)I1 > I2d)I1 < I2 < 2 I1Correct answer is option 'A'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about The cathode of a photoelectric cell is changedsuch that the work function changes from W1 toW2 (W2 > W1). If the current before and afterchanges are I1 and I2, all other conditionsremaining unchanged, then (assuming hν> W2)[1992]a)I1 = I2b)I1 < I2c)I1 > I2d)I1 < I2 < 2 I1Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The cathode of a photoelectric cell is changedsuch that the work function changes from W1 toW2 (W2 > W1). If the current before and afterchanges are I1 and I2, all other conditionsremaining unchanged, then (assuming hν> W2)[1992]a)I1 = I2b)I1 < I2c)I1 > I2d)I1 < I2 < 2 I1Correct answer is option 'A'. Can you explain this answer?.
The cathode of a photoelectric cell is changedsuch that the work function changes from W1 toW2 (W2 > W1). If the current before and afterchanges are I1 and I2, all other conditionsremaining unchanged, then (assuming hν> W2)[1992]a)I1 = I2b)I1 < I2c)I1 > I2d)I1 < I2 < 2 I1Correct answer is option 'A'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about The cathode of a photoelectric cell is changedsuch that the work function changes from W1 toW2 (W2 > W1). If the current before and afterchanges are I1 and I2, all other conditionsremaining unchanged, then (assuming hν> W2)[1992]a)I1 = I2b)I1 < I2c)I1 > I2d)I1 < I2 < 2 I1Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The cathode of a photoelectric cell is changedsuch that the work function changes from W1 toW2 (W2 > W1). If the current before and afterchanges are I1 and I2, all other conditionsremaining unchanged, then (assuming hν> W2)[1992]a)I1 = I2b)I1 < I2c)I1 > I2d)I1 < I2 < 2 I1Correct answer is option 'A'. Can you explain this answer?.
Solutions for The cathode of a photoelectric cell is changedsuch that the work function changes from W1 toW2 (W2 > W1). If the current before and afterchanges are I1 and I2, all other conditionsremaining unchanged, then (assuming hν> W2)[1992]a)I1 = I2b)I1 < I2c)I1 > I2d)I1 < I2 < 2 I1Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12.
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The cathode of a photoelectric cell is changedsuch that the work function changes from W1 toW2 (W2 > W1). If the current before and afterchanges are I1 and I2, all other conditionsremaining unchanged, then (assuming hν> W2)[1992]a)I1 = I2b)I1 < I2c)I1 > I2d)I1 < I2 < 2 I1Correct answer is option 'A'. Can you explain this answer?, a detailed solution for The cathode of a photoelectric cell is changedsuch that the work function changes from W1 toW2 (W2 > W1). If the current before and afterchanges are I1 and I2, all other conditionsremaining unchanged, then (assuming hν> W2)[1992]a)I1 = I2b)I1 < I2c)I1 > I2d)I1 < I2 < 2 I1Correct answer is option 'A'. Can you explain this answer? has been provided alongside types of The cathode of a photoelectric cell is changedsuch that the work function changes from W1 toW2 (W2 > W1). If the current before and afterchanges are I1 and I2, all other conditionsremaining unchanged, then (assuming hν> W2)[1992]a)I1 = I2b)I1 < I2c)I1 > I2d)I1 < I2 < 2 I1Correct answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
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