30 Questions
What is the fundamental principle behind the operation of a solar cell?
The photovoltaic effect
What is a solar cell in its most basic form?
A p-n junction diode
What is the term used to describe the combination of individual solar cells?
Solar panel
What is the characteristic of a device that changes its electrical properties when exposed to light?
Photoelectricity
What is the primary function of a solar cell?
To convert light energy into electrical energy
What is another term used to describe a solar cell?
Photoelectric cell
What happens to the concentration of holes on the p-type side as the concentration of electrons on the n-type side increases?
It increases
What is the voltage generated across the p-n junction due to the difference in concentration of electrons and holes?
Photovoltage
What is the purpose of doping silicon in the manufacturing process of solar cells?
To allow electricity to flow through it in a specific way
What type of material is silicon, and what are its properties?
Semiconductor, does not naturally conduct electricity but can be made to do so
What is the characteristic of p-type silicon?
It has a small number of electrons
What is the structure of a solar cell?
A sandwich of two layers of silicon
What is the characteristic of spin alignment in antiferromagnetic materials?
Antiparallel manner
Which type of magnetic material has a large magnetization even for a small applied external field?
Ferrimagnetic material
What is the property of soft magnetic materials that makes them suitable for making electromagnets?
Easy magnetization and demagnetization
What happens to the susceptibility of antiferromagnetic materials beyond the Neel temperature?
It decreases
Which type of magnetic material has a small and positive susceptibility that depends on temperature?
Antiferromagnetic material
What is the characteristic of the hysteresis loop of soft magnetic materials?
Small and narrow
What happens to a ferromagnetic substance when it is inserted in a current-carrying coil?
It becomes magnetized
What is the purpose of hysteresis in a ferromagnetic substance?
To demagnetize the substance by reversing the direction of the current
What is the point at which the magnetic flux density remains constant, regardless of the magnetic field strength?
Saturation point
What is the term for the amount of force required to remove a material's retentivity?
Coercive force
What is the result of the hysteresis loop in electric machines' ferromagnetic cores?
Hysteresis loss
What is the process of continuously monitoring the magnetic flux released by a ferromagnetic substance as the external magnetizing field is altered?
Hysteresis loop formation
What is the primary characteristic of a Schottky diode?
Low forward voltage drop
What type of contact is formed when a metal and a semiconductor are joined, allowing current to pass in one direction?
Rectifying contact
What is the term used to describe the highest energy level that an electron can occupy at absolute zero temperature?
Fermi Level
What is the purpose of an energy level diagram in understanding the working of a Schottky diode?
To understand the energy levels of the semiconductor
What is the difference between a rectifying contact and an ohmic contact?
Rectifying contact allows current to flow in one direction, while ohmic contact allows current to flow in both directions
What is the condition at which the Fermi level is considered as the sea of fermions?
At absolute zero temperature
Test your knowledge on various sources of energy, including solar cells, electromagnets, and piezoelectric generators. This quiz covers the basics of energy generation and conversion.
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