For confinement of electron in a box of radius 10-14m the electron, speed should be_____________?

Related Mcqs:

1. When an electron moving with a uniform speed in a vacuum enters a magnetic field in a direction perpendicular to the field the subsequent path of the electron is ___________________?

   A. a straight line parallel to the field B. a parabola in a plane perpendicular to the field C. a circle in a plane perpendicular to the field D. a straight line along its initial direction...

2. A particle of mass m charge q and speed V enters a uniform magnetic radius r. The radius r of the circle is_________________?

   A. independent mass m B. directly proportional to m C. directly proportional to q D. directly proportional to B...

3. In bringing an electron towards the second electron, the electrostatic potential energy of the system

   A. Decreases B. increases C. remains the same D. becomes zero Submitted by: Tauseef Ali...

4. If a car moves with a uniform speed of 2 ms-1 in a circle of radius 0.4. Its angular speed is______________?

   A. 4 rad. S-1 B. 5 rad. S-1 C. 1.6 rad. S-1 D. 2.8 ms-1...

5. A body moving along the circumference of a circle completes two revolutions. If the radius of the circular path is R the ration of displacement to the covered path will be_____________?

   A. πR B. 2π R C. 0 D. 4πR...

6. When a body moves in a circle of radius r with linear speed V its centripetal force is_______________?

   A. mV/r2 B. mV/r C. mV2/r D. mV2/r2...

7. An object travels at constant speed around a circle of radius 1.0 m in 2.0 seconds. What is the magnitude of its acceleration?

   A. 0 B. π2 C. 2 π2 D. 4 π2 Submitted by: Tauseef Ali...

8. A train is moving with a speed of 100mph. What will be its speed in m/s.?

   A. 45 m/s B. 90 m/s C. 100 m/s D. 120 m/s Submitted by: Zahid Jagirani...

9. In an electron microscope, we use energetic particles because of______________?

   A. Penetrating power is high B. Kinetic energy is large C. Wavelength is very short D. All the above reasons...

10. Electron moves in the orbit as________________?

    A. Simple vibratory motion B. Standing wave motion C. Vibratory motion like up and down D. S.H.M likes the sound...