Solar PV

How much time does it take for the Earth to receive enough solar energy to meet our annual needs?

• Less than an hour

• Less than a day

• Less than a week

• Less than a month

What is the effective power range of an individual solar cell?

• 0.5 to 1.5 W

• 2 to 3 W

• 5 to 10 W

• 10 to 15 W

What can be used in addition to photovoltaic panels to increase the efficiencies of solar cells?

• Solar batteries

• Solar concentrators

• Solar inverters

• Solar reflectors

Einstein's recognition about light striking a material suggests that light delivers energy in the form of a:

• Wave

• Particle

• Photon

• Continuous stream

The amount of energy delivered by a photon depends on the:

• Intensity of the radiation

• Mass of the photon

• Frequency of the radiation

• Speed of the radiation

For an electron to be promoted from the valence band to the conduction band, the energy absorbed must be:

• Less than the bandgap

• Equal to the bandgap

• At least as large as the bandgap

• Twice as large as the bandgap

How do atomic orbitals combine in the context of semiconductors?

• By ionic bonding.

• By metallic bonding.

• Covalently.

• They do not combine.

Which type of semiconductor is created by adding impurities that provide extra electrons?

• p-type

• n-type

• Intrinsic

• Extrinsic

What happens when electrons in a semiconductor are promoted to the conduction band?

• Holes are generated in the valence band

• The Fermi level decreases

• The bandgap increases

• The semiconductor becomes an insulator

What is the process called in which an impurity is added to the solid-state structure to improve the concentration of holes and electrons?

• Doping

• Bonding

• Fusing

• Mixing