Tender For purchase of physics lab equipments as per boq - physics lab equipments, melde s string experiment setup to find the frequency of an electrically vibrating metal tip. melde s apparatus electrical vibrator of frequency 50 hz with ac power supply, 3 meter length of strong white cord, bench clamp and pulley for attachment to the edge of a bench,plastic scale pan with hook to carry weights for tensioning the cord., photo-electric effect, - complete setup to determine the planck s constant planck constant by photoelectric effect : photosensitive device : cs vacuum photo tube , light source : halogen tungsten lamp12v/35w , color filters : 635nm(red), 570nm(orange), 540nm(yellow), 500nm (green), 460nm (blue), accelerating voltage : -15v to ov & o to 15v, 2% , output : 15v continuously variable through multi-turn pot , display : 3 digit 7-segment led , accuracy : 0.2% , current detecting unit : digital nano ammeter , range : 10001.1a, 1001.1a, 10[ta a 1 a , resolution : 1na , display : 3 digit 7-segment led , accuracy : 0.2% , power requirement : 220v 10%, 50hz , current multiplier : 1, 0.1, 0.01 & 0.001, scale : length 400 mm , dark- current : 0.003 a , measuring error : 15% compared with the recognized value (h=6.62619 10-34j.s) . .
20 Sep, 2025
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