The charge on an electron was determine by ________________?

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

   A. 107m/sec
   B. Should be greater than the speed of light.
   C. Be zero
   D. Not be wave-like

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. A particle having the mass of an electron and the charge of a proton is called a______________?

   A. Antiproton
   B. Positron
   C. Gamma rays
   D. Photon

5. A million electron are added to a pith ball. Its charge is________?

   A. – 1.6 × 10^–12 coulomb
   B. – 1.6 × 10^–13 coulomb
   C. – 1.6 × 10 ^–18 coulomb
   D. – 1.6 × 10 coulomb

   Submitted by: Tauseef Ali

6. A cube of side 5 cm has a charge of 6 C. The surface density of charge is_________?

   A. 100 C m^–2
   B. 200 C m^–2
   C. 300 C m^–2
   D. 400 C m^–2

   Submitted by: Tauseef Ali

7. 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

8. In the electron microscope, electric & magnetic fields are used as_______________?

   A. Electromagnetic gun
   B. Source of electromagnetic waves
   C. Deflecting charged particle
   D. Converging source of electrons

9. 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

10. Wave-like characteristic of electron is demonstrated by______________?

    A. Line spectrum of atoms
    B. Production of x-rays.
    C. Diffraction by crystalline solids
    D. Photoelectric effect