Home
Class 12
PHYSICS
Two large parallel plates are connected ...

Two large parallel plates are connected with the terminal of `100 V` power supply. These plates have a fine hole at the centre . An electron having energy `200 eV` is so directed that it passes through the holes . When it comes out its de - Broglie wavelength is

A

1.22 Å

B

1.75 Å

C

2 Å

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • ELECTRON, PHOTON, PHOTOELECTRIC EFFECT AND X-RAYS

    ERRORLESS |Exercise Cathode Rays and Positive Rays|11 Videos

  • ELECTRON, PHOTON, PHOTOELECTRIC EFFECT AND X-RAYS

    ERRORLESS |Exercise Photon and Photoelectric Effect|4 Videos

  • ELECTRO MAGNETIC INDUCTION

    ERRORLESS |Exercise SET|20 Videos

  • ELECTRONICS

    ERRORLESS |Exercise Selv Evaluation Test|23 Videos

Similar Questions

Explore conceptually related problems

An electron is having a kinetic energy of 50 eV. Its de-Broglie wavelength is

An electron is having a kinetic energy of 50 eV. Its de broglie wavelength is

The two parallel plates of a condenser have been connected to a battery of 300 V and the charge collected at each plate is 1muC. The energy supplied by battery is :

The parallel plate capacitor has potential difference of 100 V and separation between the plate is 1 mm. An electron is projected along x axis in between the plates. If the electron comes out of the plates along the x axis undevated then the magnitude and direction of magnetic field that must be applied between the plates : (particle is projected with a velocity of 10^5 m//s along x axis)

A cathode ray tube contains a pair of parallel metal plates 1.0 cm apart and 3.0 cm long. A narrow horizontal beam of electron with a velocity of 3 xx 10^(7) ms^(-1) is passed down the tube midway betwwen the two plates. When a potential difference of 550 V is maintained across the plates, it is found that the electron beam is so deflected that it just strikes the end of one of the plates. then the specific change of an electron (that is, the ratio of its change to mass) in C//kg is :

Two recangular plates A and B placed at a distance 2a apart, are connected to a battery to produce an electric field. There are insulators between plantes C and other two plates. A magnetic field exists along z-axis. A charged particle of mass m and charge q passes through a hole at the middle of the plate A with velocity v and strikes at Q which is the middle of the bottom edge of plate B after passing through a hole inplate C. If E = mv^(2)//qa , what will be the speed of the particle at Q?

The plates of a parallel plate capacitor have an area of 100cm^(2) each and area separated by 2.5 mm. the capacitor is charged to 200V. Calculate the energy stored in the capacitor.