If the collector supply voltage is doubled, what happens to the load line?

The graph of current gain versus collector current indicates that the current gain
a. Is constant
b. Varies slightly
c. Varies significantly
d. Equals the collector current divided by the base current

The graph of current gain versus collector current indicates that the current gain
a. Is constant
b. Varies slightly
c. Varies significantly
d. Equals the collector current divided by the base current

A photon of initial energy 0.1 MeV undergoes Compton scattering at an angle of $60^{\circ}$. Find (a) the energy of the scattered photon, (b) the recoil kinetic energy of the electron, and (c) the recoil angle of the electron.

Gamma rays of energy 0.662 MeV are Compton scattered. (a) What is the energy of the scattered photon observed at a scattering angle of $60.0^{\circ}$? (b) What is the kinetic energy of the scattered electrons?

Incident photons of energy 10.39 keV are Compton scattered, and the scattered beam is observed at $45.00^{\circ}$ relative to the incident beam. (a) What is the energy of the scattered photons at that angle? (b) What is the kinetic energy of the scattered electrons?

(a) Assuming the Sun to radiate like an ideal thermal source at a temperature of 6000 K, what is the intensity of the solar radiation emitted in the range 550.0 nm to 552.0 nm? (b) What fraction of the total solar radiation does this represent?

An analyzer for thermal radiation is set to accept wave lengths in an interval of 1.55 nm. What is the intensity of the radiation in that interval at a wavelength of 875 nm emitted from a glowing object whose temperature is 1675 K?

The universe is filled with thermal radiation, which has a blackbody spectrum at an effective temperature of 2.7 K. What is the peak wavelength of this radiation? What is the energy (in eV) of quanta at the peak wavelength? In what region of the electromagnetic spectrum is this peak wavelength?

The surface of the Sun has a temperature of about 6000 K. At what wavelength does the Sun emit its peak intensity? How does this compare with the peak sensitivity of the human eye?

A surface of zinc is illuminated and photoelectrons are observed. (a) What is the largest wavelength that will cause photoelectrons to be emitted? (b) What is the stopping potential when light of wavelength 220.0 nm is used?

The cutoff wavelength for the photoelectric effect in a certain metal is 254 nm. (a) What is the work function for that metal? (b) Will the photoelectric effect be observed for $\lambda>254 \mathrm{nm}$ or for $\lambda<254 \mathrm{nm}$?

What is the cutoff wavelength for the photoelectric effect using an aluminum surface?

The range of electromagnetic wave frequencies on the $\mathrm{FM}$ radio band is $88.0 \mathrm{MHz}$ to $108 \mathrm{MHz}$. (a) What is the range of wavelengths for the FM radio band? (b) What is the range of photon energy for the FM radio band? (c) Explain the relationship between frequency and photon energy.