AP EAMCET · PHYSICS · Dual Nature of Matter
The electric field associated with a mono chromatic light wave is given by \(E=E_0 \sin \left[\left(1.57 \times 10^7 \mathrm{~m}^{-1}\right](x-c t)\right]\) then the stopping potential when this light is used in a photoelectric experiment with the metal having work function \(1.9 \mathrm{eV}\) is.
[Planck's constant, \(h=6.64 \times 10^{-34} \mathrm{~J}-\mathrm{s}\) ]
- A \(0.5 \mathrm{~V}\)
- B \(3.2 \mathrm{~V}\)
- C \(1.1 \mathrm{~V}\)
- D \(0.75 \mathrm{~V}\)
Answer & Solution
Correct Answer
(C) \(1.1 \mathrm{~V}\)
Step-by-step Solution
Detailed explanation
Given, \(E=E_0 \sin \left[\left(1.57 \times 10^7 \mathrm{~m}^{-1}\right)(x-c t)\right]...(i)\) Work function, \(\phi_0=1.9 \mathrm{eV}=1.9 \times 1.6 \times 10^{-19} \mathrm{~J}\) Given, planck's constant , \(h=6.64 \times 10^{-34} \mathrm{~J}-\mathrm{s}\) We know that,…
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