Home
Class 12
PHYSICS
Two metallic plates A and B, each of are...

Two metallic plates A and B, each of area `5xx10^(-4)m^(2)`, are placed parallel to each other at a separation of 1 cm. Plate B carries a positive charge of `33.7xx10^(-12)C`. A monochromatic beam of light, with photons of energy 5 eV each, starts falling on plate A at t=0 so that `10^(16)` photons fall on it per square metre per second. Assume that one photoelectron is emitted for every `10^(6)` incident photons. Also assume that all the emitted photoelectrons are collected by plate B and the work function of plants A remains constant at the value 2 eV. Determine the number of photoelectrons emitted upto t = 10 s.

A

`2xx10^(3)` N/C

B

`10^(3)` N/C

C

`5xx10^(3)` N/C

D

Zero

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • ELECTRON,PHONTS,PHOTOELECTRIC EFFECT & X-RAYS

    CENGAGE PHYSICS ENGLISH|Exercise dpp 3.2|15 Videos

  • ELECTROMAGNETIC INDUCTION

    CENGAGE PHYSICS ENGLISH|Exercise compression type|7 Videos

  • GEOMETRICAL OPTICS

    CENGAGE PHYSICS ENGLISH|Exercise Integer Type|4 Videos

Similar Questions

Explore conceptually related problems

Two metallic plates A and B , each of area 5 xx 10m are placed parallel to each other at a separation of 1 cm . Plate B carries a positive charge of 33.7 pc . A monochromatic beam of light, with photons of energy 5 eV each, starts falling on plate A at t = 0, so that 10 photons fall on it per square meter per second. Assume that one photoelectron is emitted for every 10 incident photons. Also assume that all the emitted photoelectrons are collected by plate B and the work function of plate A remains constant at the value 2 eV . Electric field between the plates at the end of 10 seconds is

Two metallic plate A and B , each of area 5 xx 10^(-4)m^(2) , are placed parallel to each at a separation of 1 cm plate B carries a positive charge of 33.7 xx 10^(-12) C A monocharonatic beam of light , with photoes of energy 5 eV each , starts falling on plate A at t = 0 so that 10^(16) photons fall on it per square meter per second. Assume that one photoelectron is emitted for every 10^(6) incident photons fall on it per square meter per second. Also assume that all the emitted photoelectrons are collected by plate B and the work function of plate A remain constant at the value 2 eV Determine (a) the number of photoelectrons emitted up to i = 10s, (b) the magnitude of the electron field between the plate A and B at i = 10 s, and (c ) the kinetic energy of the most energotic photoelectrons emitted at i = 10 s whenit reaches plate B Negilect the time taken by the photoelectrons to reach plate B Take epsilon_(0) = 8.85 xx 10^(-12)C^(2)N- m^(2)

Two plates, each of area A, are placed parallel to each other at a distance d. One plate is connected to a battery of emf E and its negative is earthed. The other plate is also earthed. The charge drawn by plate is

At t=O, light of intensity 10^(12) photons/ s-m^(2) of energy 6eV per photon starts falling on a plate with work founction 2.5 eV If area of the plate is 2xx10^(-4) m^(2) and for every 10^(5) photons one photoelectron is emitted, charge on the plate at t=25 s is

Three plates A,B and C each of area 0.1m^(2) are separated by 0.885 mm from each other as shown in the figure. A 10 V battery is used to charge the system. The enegry stored in the system is

A small plate of a metal is placed at a distance of 2m from a monochromatic light source of wavelenght 4.8xx10^(-7)m and power 1.0 Watt. The light falls normally on the plate. Find the number of photons striking the metal plate per square metre per second.

A light of intensity 16 mW and energy of each photon 10 eV incident on a metal plate of work function 5 eV and area 10^(-4)m^(2) then find the maximum kinetic energy of emitted electrons and the number of photoelectrons emitted per second if photon efficiency is 10% .

A light beam consists of two types of photons. In one type, each photon has the energy 2 eV and in another type, each photon has energy 3 eV. The light beam is incident on a photoelectric material of work function 1 eV. The maximum kinetic enregy of emitted photoelectron is

The plates of a parallel plate capacitance 1.0 F are separated by a distance d =1 cm. Find the plate area .