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NEET
Exam
NEET
Subject
Physics
Chapter
Dual Nature of Matter

NEET · Physics · Dual Nature of Matter

The graph of stopping potential (V_ s ) against frequency (v) of...

The graph of stopping potential (Vs)\left(\mathrm{V}_{s}\right) against frequency (v)(v) of incident radiation is plotted for two different metals 'P' and 'Q' as shown in the graph. ϕpandϕq\phi_{\mathrm{p}} and \phi_{\mathrm{q}} are work functions of PandQ\mathrm{P} and \mathrm{Q} respectively, then The graph of stopping potential (V_ s ) against frequency (v) of incident radiation is plotted for two different metals

Options

  1. AϕP=ϕQ\phi_{\mathrm{P}}=\phi_{\mathrm{Q}}
  2. Bv0′<v0v_{0}^{\prime} < v_{0}
  3. CϕP<ϕQ\phi_{\mathrm{P}} < \phi_{\mathrm{Q}}
  4. DϕP>ϕQ\phi_{\mathrm{P}}>\phi_{\mathrm{Q}}

Correct answer

C. ϕP<ϕQ\phi_{\mathrm{P}} < \phi_{\mathrm{Q}}

Step-by-step solution

(B) ϕ=hvo∴ϕ∝vo\phi=\mathrm{hv}_{\mathrm{o}} \quad \therefore \phi \propto \mathrm{v}_{\mathrm{o}} vo<vo′∴ϕp<ϕQv_{\mathrm{o}} < v_{\mathrm{o}}^{\prime} \quad \therefore \phi_{\mathrm{p}} < \phi_{\mathrm{Q}}
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