parallel series πΌπππ‘π‘πππ¦ =πΌ1 = πΌ2 = πΌ3 πΌπππ‘π‘πππ¦ =πΌ1 + πΌ2 + πΌ3 current ππππ‘π‘πππ¦ =π1 + π2 ππππ‘π‘πππ¦ =π1 = π2 Voltage 1 1 1 1 = + + + β―………. π π 1 π 2 π 3 Equivalent resistance Increase the equivalent resistance Decreasing the current Decreases the equivalent resistance Increasing the current Effect of adding new resistance Current stop flowing Affected Current continue to flow Not affected Effect of removing bulb The one with higher resistance The one with lower resistance The hottest one π ππ = π 1 + π 2 + π 3 +………. Check your understanding: (5min.) The circuit shown below contains three bulbs(1;2; and 3) with different resistance. ο In 3 minutes. Copy the table below in your notebook. ο Fill the cells in the table by using : (the number of the bulb; None; or all bulbs). ο In discussion time mark for your self. The bulb or bulbs that has or have brightness The highest The Lowest Higher resistance 90Ω Bulb 3 Lower resistance 30Ω Bulb 1 120v E= Pt E= The same Drop of potential energy Bulb 3 Bulb 1 Amount of transfer energy in a second Bulb 1 Bulb 3 Aseel Mohamed 10A Ms. Tahani 60β¦ 90β¦ 1 2 3 π2 π₯ π π‘ Amount of transfer energy in a second E Bulb 1 1202 30 I battery I1= I2= I3 Bulb 1,2 ,3 The amount of current 30β¦ E= x1 E= 480J Bulb 2 1202 60 E= x1 E= 240J Bulb 3 1202 90 E= x1 E= 160J Check your understanding: (5min.) 1 The circuit shown below contains three bulbs(1;2; and 3) with different resistance. ο In 3 minutes. Copy the table below in your note book. ο Fill the cells in the table by using : (the number of the bulb; None; or all bulbs). ο In discussion time mark for your self. The bulb or bulbs that has or have brightness The amount of current The highest The Lowest Lower resistance 30Ω Bulb 3 Higher resistance 90Ω Bulb 1 High current = Low resistance Bulb 3 = 30Ω Low current = High resistance Bulb 1 = 90Ω The same π½πππππππ =π½π = π½π = π½π Drop of potential energy Bulb 1,2, 3 Amount of transfer energy in a second Bulb 3 Aseel Mohamed 10A Ms. Tahani Bulb 1 2 3
