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यदि 6 इलेक्ट्रॉन वाल्ट की फोटों ऊर्जा `2*1 eV` कार्य फलन वाली सतह पर आपतित की जाए तो निरोधी विभव का मान होगा ---

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यदि 6 इलेक्ट्रॉन वाल्ट की फोटों ऊर्जा `2*1 eV` कार्य फलन वाली सतह पर आपतित की जाए तो निरोधी विभव का मान होगा ---
A. `5V`
B. `-1*9V`
C. `-3*9V`
D. `-8*1V`
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Correct Answer - C
`eV_0 = hu - phi ` से, `eV_0 = 6 - 2*1 = 3*9eV`
अतः `v_0 = -3*9` वाल्ट, निरोधी विभव ट्रान्त्मक विभव होता है |
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