What is the relationship between the stopping potential and the maximum kinetic

Practice Questions

Q1
What is the relationship between the stopping potential and the maximum kinetic energy of emitted electrons in the photoelectric effect?
  1. Stopping potential is directly proportional to the work function
  2. Stopping potential is directly proportional to the maximum kinetic energy
  3. Stopping potential is inversely proportional to the frequency
  4. Stopping potential has no relation to kinetic energy

Questions & Step-by-Step Solutions

What is the relationship between the stopping potential and the maximum kinetic energy of emitted electrons in the photoelectric effect?
  • Step 1: Understand the photoelectric effect. This is when light hits a metal surface and causes electrons to be emitted.
  • Step 2: Know that when electrons are emitted, they have kinetic energy, which is the energy of motion.
  • Step 3: The maximum kinetic energy (KE) of the emitted electrons depends on the energy of the incoming light.
  • Step 4: The stopping potential (V) is the voltage needed to stop these emitted electrons from reaching a detector.
  • Step 5: The relationship between stopping potential and maximum kinetic energy is given by the formula KE = eV.
  • Step 6: In this formula, 'e' is the charge of an electron, and 'V' is the stopping potential.
  • Step 7: This means that if you increase the stopping potential, the maximum kinetic energy of the electrons also increases.
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