Question and Answers Forum

All Questions      Topic List

Others Questions

Previous in All Question      Next in All Question      

Previous in Others      Next in Others      

Question Number 18460 by tawa tawa last updated on 21/Jul/17

Answered by sandy_suhendra last updated on 23/Jul/17

P_(bulb) =5 w  V_(bulb) =170 V  I_(bulb)  = (P_(bulb) /V_(bulb) ) = (5/(170)) Ampere = I_(resistance)   V_(resistance)  = 380−170 = 210 V  R_(resistance)  = (V_(res) /I_(res) ) = ((210)/(5/170)) = 7140 ohm (C)

$$\mathrm{P}_{\mathrm{bulb}} =\mathrm{5}\:\mathrm{w} \\ $$$$\mathrm{V}_{\mathrm{bulb}} =\mathrm{170}\:\mathrm{V} \\ $$$$\mathrm{I}_{\mathrm{bulb}} \:=\:\frac{\mathrm{P}_{\mathrm{bulb}} }{\mathrm{V}_{\mathrm{bulb}} }\:=\:\frac{\mathrm{5}}{\mathrm{170}}\:\mathrm{Ampere}\:=\:\mathrm{I}_{\mathrm{resistance}} \\ $$$$\mathrm{V}_{\mathrm{resistance}} \:=\:\mathrm{380}−\mathrm{170}\:=\:\mathrm{210}\:\mathrm{V} \\ $$$$\mathrm{R}_{\mathrm{resistance}} \:=\:\frac{\mathrm{V}_{\mathrm{res}} }{\mathrm{I}_{\mathrm{res}} }\:=\:\frac{\mathrm{210}}{\mathrm{5}/\mathrm{170}}\:=\:\mathrm{7140}\:\mathrm{ohm}\:\left(\mathrm{C}\right) \\ $$

Terms of Service

Privacy Policy

Contact: info@tinkutara.com