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Term photo voltaic comes from
Spanish
Greek
German
English
Greek
The term 'photovoltaic' is derived from the Greek word 'phos' (meaning light) and the name of the Italian physicist Alessandro Volta, the inventor of the electric pile ┬╖ It describes the physical phenomenon of converting light directly into electricity at the atomic level.
The term 'photovoltaic' is derived from the Greek word 'phos' (meaning light) and the name of the Italian physicist Alessandro Volta, the inventor of the electric pile ┬╖ It describes the physical phenomenon of converting light directly into electricity at the atomic level.
E=h╬╜ тАФ Energy of an incident photon related to frequency ╬╜
VocтАЛ=qnkTтАЛln(I0тАЛIphтАЛтАЛ+1) тАФ Open circuit voltage of a solar cell
The principle relies on the photovoltaic effect, where photons in sunlight strike a semiconductor material like Silicon ┬╖ These photons transfer their energy to electrons, exciting them from the valence band to the conduction band, thereby creating electron-hole pairs ┬╖ An internal electric field, typically formed by a p-n junction, forces these charges to flow in a specific direction, generating a DC current.
The photovoltaic effect was first observed by Edmond Becquerel in 1839.
The conversion process is a direct energy conversion, unlike thermal solar generation.
The efficiency of commercial silicon cells typically ranges between 15% and 22%.
No moving parts, leading to low maintenance.
Silent operation and scalable from mW to GW.
High initial capital cost for installation.
Efficiency depends on irradiance levels and ambient temperature.
Residential solar rooftop power plants.
Spacecraft and satellite power systems.
The term 'Photo' comes from Greek 'phos' (light).
The suffix '-voltaic' honors Alessandro Volta, creator of the first chemical battery.
Option A (Spanish), C (German), and D (English) are incorrect linguistic roots.
B is correct тАФ The term 'photovoltaic' is a hybrid word combining the Greek 'phos' (light) and the surname of Alessandro Volta.
In competitive exams, remember that while 'photo' is Greek, many units in electricity are named after scientists (e.g., Volt, Ampere, Watt) as a standard scientific naming convention.