METHOD AND AN APPARATUS FOR EXPERIENCE EXPERIMENT OF OHM'S LAWBY USING CDS, LED, REED SWITCH

摘要

PURPOSE: A device for experience experiment of ohm's law by using CdS, an LED, and a reed switch and a method thereof are provided to easily find the relations among a voltage, a current, and resistance with fun, thereby enhancing learning effects. CONSTITUTION: A first component unit(10) connects CdS with an LED in series. A second component unit(20) connects two component groups, in which the CdS and the LED are connected in parallel, by a conductive line. A third component unit(30) connects an LED with a reed switch(32). A power source unit(40) supplies power to a circuit.