Photoelectric Effect Quiz

A photon with a frequency of $8 \times 10^{14}$ Hz strikes a metal surface, causing the emission of an electron. If the work function of the metal is $3.2 \times 10^{-19}$ J, what is the kinetic energy of the emitted electron? (Use Planck's constant $h = 6.63 \times 10^{-34}$ Js)

• $2.0 \times 10^{-19}$ J

• $1.0 \times 10^{-19}$ J

• $3.0 \times 10^{-19}$ J

• $4.0 \times 10^{-19}$ J

The threshold frequency for a certain metal is $5 \times 10^{14}$ Hz. What is the work function of this metal? (Use Planck's constant $h = 6.63 \times 10^{-34}$ Js)

• $3.32 \times 10^{-19}$ J

• $2.65 \times 10^{-19}$ J

• $1.99 \times 10^{-19}$ J

• $4.15 \times 10^{-19}$ J

If the work function of a metal is $4.0 \times 10^{-19}$ J, what is the minimum frequency of light required to emit electrons from this metal?

• $6.05 \times 10^{14}$ Hz

• $9.65 \times 10^{14}$ Hz

• $4.82 \times 10^{14}$ Hz

• $7.25 \times 10^{14}$ Hz

A metal surface has a work function of $2.5 \times 10^{-19}$ J. If light of frequency $7 \times 10^{14}$ Hz is incident on the surface, what is the maximum kinetic energy of the emitted electrons?

• $1.14 \times 10^{-19}$ J

• $2.14 \times 10^{-19}$ J

• $3.14 \times 10^{-19}$ J

• $4.14 \times 10^{-19}$ J

Calculate the energy of a photon that has a frequency of $6 \times 10^{14}$ Hz. (Use Planck's constant $h = 6.63 \times 10^{-34}$ Js)

• $3.98 \times 10^{-19}$ J

• $2.98 \times 10^{-19}$ J

• $1.98 \times 10^{-19}$ J

• $4.98 \times 10^{-19}$ J

A photon with energy $5 \times 10^{-19}$ J strikes a metal surface with a work function of $3 \times 10^{-19}$ J. What is the frequency of the photon?

• $7.54 \times 10^{14}$ Hz

• $1.21 \times 10^{15}$ Hz

• $8.54 \times 10^{14}$ Hz

• $9.54 \times 10^{14}$ Hz

The work function of a metal is $2.0 \times 10^{-19}$ J. If the frequency of the incident light is $5 \times 10^{14}$ Hz, what is the stopping potential required to stop the emitted electrons?

• 0.5 V

• 1.0 V

• 1.5 V

• 2.0 V

If the threshold frequency of a metal is $4 \times 10^{14}$ Hz, what is the wavelength of the light that just causes photoemission? (Use the speed of light $c = 3 \times 10^8$ m/s)

• 750 nm

• 600 nm

• 500 nm

• 400 nm

A metal has a threshold frequency of $6 \times 10^{14}$ Hz. If light of frequency $8 \times 10^{14}$ Hz is used, what is the kinetic energy of the emitted electrons?

• $1.32 \times 10^{-19}$ J

• $2.32 \times 10^{-19}$ J

• $3.32 \times 10^{-19}$ J

• $4.32 \times 10^{-19}$ J

The work function of a certain metal is $3.5 \times 10^{-19}$ J. What is the maximum wavelength of light that can cause photoemission from this metal? (Use Planck's constant $h = 6.63 \times 10^{-34}$ Js and the speed of light $c = 3 \times 10^8$ m/s)

• 570 nm

• 710 nm

• 850 nm

• 950 nm