Define stopping potential

Light is incident on the cathode of a photocell and the stopping voltages are measured for light of two different wavelengths, are given below. a. Determine the work function of the metal of the cathode in eV. b. Find the value of the universal constant (hc)/(e ) . c. Define stopping potential and work function. d. Can you suggest a mathematical relation between kinetic energy and stopping potential?

Define resting potential , action potential and electrical potential.

At the threshold frequency, stopping potential is "__________" .