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Standard XII

Physics

Current and Drift Velocity Relation

For a certain...

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{ For a certain metal, v is five times the }v_0 and the }} maximum velocity of coming out photo electrons is }{8×10^6 . If }v=2v_0 , the maximum velocity of photo }} electrons will be

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Q. For a certain metal

v

is five times the

v_{0}

and the maximum velocity of coming photo-electrons is

8 \times 10^{6}

. If

v = 2 v_{0}

, the maximum velocity of photo electrons will be :

Q. The threshold frequency for a certain metal is

v_{0}

when a certain radiation of frequency 2

v_{0}

incident on this metal surface maximum velocity of photo electrons emitted is

2 \times 10^{6}

m/s, if radiation of frequency 3

v_{0}

is incident on the same metal surface, the maximum velocity of the photo electrons emitted (in m/s ) is :

Q. The threshold frequency for certain metal is

ν_{0} .

When light of frequency

2 ν_{0}

is incident on it the maximum velocity of photo electrons is

4 \times 10^{6} {ms}^{- 1} .

If the frequency of incident radiation is increased to

4 ν_{0}

, then the maximum velocity of photo electrons will be-

A photosensitive metallic surface has work function $h v_{0}$ . If photons of energy $2 h v_{0}$ fall on this surface the electrons come out with a maximum velocity of $4 \times 10^{6} m / s$ . When the photon energy is increases to $5 h v_{0}$ then maximum velocity of photo electron will be

Q. Light of frequency

ν = 5 ν_{0}

falls on a certain metal, then maximum velocity of electrons emitted is

8 \times 10^{6}

m/s where

ν_{0}

is threshold frequency of metal. If

ν = 2 ν_{0}

, then the maximum velocity of photoelectrons will be

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