Download App

Electron, Photon, Photoelectric Effect and X-Rays — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsElectron, Photon, Photoelectric Effect and X-Rays1 Mark
Question
Assertion  :   When the speed of an electron increases its specific charge decreases.
Reason      : Specific charge is the ratio of the charge to mass.(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.
 
 
 
 
✓

Answer

(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Electron, Photon, Photoelectric Effect and X-Rays→Electron, Photon, Photoelectric Effect and X-Rays — all question types→Physics STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

An alternating voltage of $141.4V (rms)$ is applied to a vacuum diode as shown in the figure. The maximum potential difference across the condenser will be
→
The potential difference applied to an X-ray tube is increased. As a result, in the emitted radiation:
  1. The intensity increases.
  2. The minimum wavelength increases.
  3. The intensity remains unchanged.
  4. The minimum wavelength decreases.
→
The wires 1 and 2
→
If the distance between parallel plates of a capacitor is halved and dielectric constant is doubled then the capacitance(a) Decreases two times(b) Increases two times(c) Increases four times(d) Remain the same
   
   
→
In the series combination of two or more than two resistances:
→
In series L - C - R resonant circuit, to increase the resonant frequency:
→
Consider a collision between an oxygen molecule and a hydrogen molecule in a mixture of oxygen and hydrogen kept at room temperature. Which of the following are pcssible?
  1. The kinetic energies of both the molecules increase.
  2. The kinetic energies of both the molecules decrease.
  3. The Kinetic energy of the oxygen molecule increases and that of the hydrogen molecule decreases.
  4. The kinetic energy of the hydrogen molecule increases and that of the oxygen molecule decreases.
→
Which of the following mirrors always forms a virtual and small image?
→
The photoelectric work function for a metal surface is 4.125 eV. The cut-off wavelength for this surface is(a) 4125 Å(b) 2062.5 Å(c) 3000 Å(d) 6000 Å
       
→
A bar magnet of magnetic moment $\overrightarrow{\mathrm{M}}$ is placed in a magnetic field of induction $\overrightarrow{\mathrm{B}}.$ The torque exerted on it is
→