A metal surface of threshold frequency 5-3 - 1014 sec -1 is exposed to a photon of radiation having energy 3-4 - 10-19 J-A- velocity of electron is 1-54 - 108 cm - secB- velocity of electron is sec 4-72 - 108 cmC- velocity of electron is zeroD- photoelectron is not emitted

The correct option is D photoelectron is not emitted E_0 = hv_0 = 6.626 × 10^ 34 5.3 × 10^14 = 3.511 × 10^ 19 J E = 3.5 × 10^ 19 J E E_0 photoelectric effect ...

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Standard XII

Physics

Stopping Potential Revisited

A metal surfa...

Question

A metal surface of threshold frequency $5.3 \times 10^{14} s e c^{- 1}$ is exposed to a photon of radiation having energy $3.4 \times 10^{- 19} J$ .

velocity of electron is 1.54 X 10⁸ cm/sec

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velocity of electron is sec 4.72 X 10⁸ cm

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velocity of electron is zero

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photoelectron is not emitted

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Solution

The correct option is D
photoelectron is not emitted

$E_{0} = h v_{0}$

= $6.626 \times 10^{- 34} 5.3 \times 10^{14}$

= $3.511 \times 10^{- 19} J$

$E = 3.5 \times 10^{- 19} J$

$E < E_{0}$ photoelectric effect is not takes place.

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A metal surface of threshold frequency 5.3 × 1014 sec−1 is exposed to a photon of radiation having energy 3.4 × 10−19 J.

The correct option is D photoelectron is not emitted E0 = hv0 = 6.626 × 10−34 5.3 × 1014 = 3.511 × 10−19 J E = 3.5 × 10−19 J E < E0 photoelectric effect is not takes place.

A metal surface of threshold frequency $5.3 \times 10^{14} s e c^{- 1}$ is exposed to a photon of radiation having energy $3.4 \times 10^{- 19} J$ .

The correct option is D
photoelectron is not emitted

$E_{0} = h v_{0}$

= $6.626 \times 10^{- 34} 5.3 \times 10^{14}$

= $3.511 \times 10^{- 19} J$

$E = 3.5 \times 10^{- 19} J$

$E < E_{0}$ photoelectric effect is not takes place.