Neco 2020 Physics Question 2

Practice objective / multiple choice question 2 from the 2020 Neco Physics examination.

Neco 2020 Physics Objective / Multiple Choice Hard Difficulty
Question 2 NECO • 2020 • PHYSICS • objective

A metal surface has a work function of \(2.20\ \text{eV}\). When it is illuminated with monochromatic light, the maximum kinetic energy of the emitted electrons is measured to be \(1.50\ \text{eV}\).\n(a) Determine the frequency and wavelength of the incident light.\n(b) The same light is now used on a second metal whose work function is \(1.80\ \text{eV}\). Calculate the stopping potential required to halt the emitted electrons from the second metal.

Answer Options

A. Frequency = 8.94×10^14 Hz; Wavelength = 350 nm; Stopping potential = 2.10 V
Correct Answer B. Frequency = 8.94×10^14 Hz; Wavelength = 336 nm; Stopping potential = 1.90 V
C. Frequency = 9.12×10^14 Hz; Wavelength = 329 nm; Stopping potential = 1.70 V
D. Frequency = 8.50×10^14 Hz; Wavelength = 353 nm; Stopping potential = 1.80 V
Correct Answer
B
Correct Option:
Frequency = 8.94×10^14 Hz; Wavelength = 336 nm; Stopping potential = 1.90 V

About This Question

This is Neco 2020 Physics Question 2. It is one of the objective questions from the 2020 Neco Physics examination.

Difficulty level: Hard .

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