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
The work function for metals A, B and C are respectively 1.92 eV, 2.0 eV and 5 eV. According to Einstein’s equation, the metals which will emit photo electrons for a radiation of wavelength 4100 Å is/are(a) None of these(b) A only(c) A and B only(d) All the three metals
       
✓

Answer

(c) A and B only

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

Pick the correct options.
  1. All electrons have magnetic moment.
  2. All protons have magnetic moment.
  3. All nuclei have magnetic moment.
  4. All atoms have magnetic moment.
→
Switch $S$ of the circuit shown in figure. is closed at $t = 0.$ If $e$ denotes the induced

$emf$ in $L$ and $i,$ the current flowing through the circuit at time $t,$ which of the following graphs is correct 
→
Which of the following is the use of superconductor?
→
A bar magnet has a magnetic moment equal to $5 \times 10^{-5}\ \ce{weber \times m}$. It is suspended in a magnetic field which has a magnetic induction $(B)$ equal to $8 \pi \times 10^{-4}$ tesla. The magnet vibrates with a period of vibration equal to $15\sec.$ The moment of inertia of the magnet is
→
Which of the following plots may represent the reactance of a series LC combination?
→
The three basic properties possessed by the electric charge are:
→
A coil resistance $20\Omega$ and inductance $5H$ is connected with a $100V$ battery. Energy stored in the coil will be
→
The potential difference between the two plates of a parallel plate capacitor is constant. When air between the plates is replaced by dielectric material, the electric field intensity:
→
In a thermocouple, the temperature that does not depend on the temperature of the cold junction is called(a) Neutral temperature(b) Temperature of inversion(c) Both the above(d) None of the above
   
   
→
Consider aiming a beam of free electrons towards free protons. When they scatter, an electron and a proton cannot combine to produce a H-atom:
→