AI Mentor

Check Your IQ

Free Expert Demo

Try Test

Courses

Dropper NEET Course Dropper JEE Course Class - 12 NEET Course Class - 12 JEE Course Class - 11 NEET Course Class - 11 JEE Course Class - 10 Foundation NEET Course Class - 10 Foundation JEE Course Class - 10 CBSE Course Class - 9 Foundation NEET Course Class - 9 Foundation JEE Course Class -9 CBSE Course Class - 8 CBSE Course Class - 7 CBSE Course Class - 6 CBSE Course

Offline Centres

A metal plate of area $1 \times 10^{- 4} m^{2}$ is illuminated by a radiation of intensity $16 m W m^{- 2}$ . The work function of the metal is $5 e V$ . The energy of the incident photons is $10 e V$ and only $10 %$ of it produces electrons. The number of emitted photoelectrons per second and their maximum energy, respectively will be $[1 e V = 1.6 \times 10^{- 19} J]$

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

$10^{10}$ and $5 e V$

$10^{14}$ and $10 e V$

$10^{12}$ and $5 e V$

$10^{11}$ and $5 e V$

answer is C.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

If $n$ photons, each with energy $E$ , are incident on area $A$ per second,

Intensity $I = \frac{n E}{A} \Rightarrow n = \frac{I A}{E} = \frac{(16 \times 10^{- 3}) \times (1 \times 10^{- 4})}{10 \times 1.6 \times 10^{- 19}} = 10^{12} s^{- 1}$

Number of emitted electrons per second is $10 % of n = (\frac{10}{100}) \times 10^{12} = 10^{11} s^{- 1}$

Maximum kinetic energy of emitted photoelectrons $K_{m a x} = E - ϕ_{0} = (10 - 5) eV = 5 eV$ .

Watch 3-min video & get full concept clarity

courses

No courses found

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Online Course for IIT JEE

Best Online Course for NEET

Best Online Course for CBSE

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Get Expert Academic Guidance – Connect with a Counselor Today!