MHT CET · Physics · Dual Nature of Matter
The figure shows the variation of photocurrent with anode potential for four different radiations. Let \(f_a, f_b, f_c\) and \(f_d\) be the frequencies for the curves \(a, b, c\) and \(d\) respectively
- A \(f_a \gt f_b \gt f_c \gt f_d\)
- B \(\mathrm{f}_{\mathrm{a}} \lt \mathrm{f}_{\mathrm{b}} \lt \mathrm{f}_{\mathrm{c}} \lt \mathrm{f}_{\mathrm{d}}\)
- C \(\mathrm{f}_{\mathrm{a}}\gt\mathrm{f}_{\mathrm{b}} \lt \mathrm{f}_{\mathrm{c}}=\mathrm{f}_{\mathrm{d}}\)
- D \(\mathrm{f}_{\mathrm{a}}=\mathrm{f}_{\mathrm{b}} \gt \mathrm{f}_{\mathrm{c}} \gt \mathrm{f}_{\mathrm{d}}\)
Answer & Solution
Correct Answer
(B) \(\mathrm{f}_{\mathrm{a}} \lt \mathrm{f}_{\mathrm{b}} \lt \mathrm{f}_{\mathrm{c}} \lt \mathrm{f}_{\mathrm{d}}\)
Step-by-step Solution
Detailed explanation
We know stopping potential is directly proportional to the frequency of the incoming radiation. This means curve ' \(a\) ' has the highest frequency and ' d ' the lowest.
\(\therefore \quad f_a \lt f_b \lt f_c \lt f_d\)
\(\therefore \quad f_a \lt f_b \lt f_c \lt f_d\)
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