C2-activities - ELECTRIC CIRCUITS ECSE-2010 Class 2...

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1 ELECTRIC CIRCUITS ECSE-2010 Class 2 ACTIVITY 2-1 6 mA 12 k 2 k var R v + i var 0 RR ( 1 T ) α =+ ACTIVITY 2-1 6 mA 12 k var R v + i var 0 ( 1 T ) 0 0 Part a) At T 0 C, v 18 V At T 100 C, v 24 V == 0 Find R and ACTIVITY 2-1 6 mA 12 k var R v + i var 0 ( 1 T ) KCL at Node a: a v 6i 12 = i in mA, v in V, R in k KVL around Resistors: Loop var v2 iRi0 −− = var v 2R i => = + ACTIVITY 2-1 6 mA 12 k var R v + i var 0 ( 1 T ) v 12 −= 0 At T 0 C; v 18 V: 18 i6 4 . 5 m A 12 =− = var v i var var 18 42R R 2 k 4.5 ==+ = > = Ω ACTIVITY 2-1 6 mA 12 k var R v + i var 0 ( 1 T ) v 12 = 0 At T 18 V: var v i var R2 k = 0 R( 1 0 ) 0 k = >=Ω
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2 ACTIVITY 2-1 6 mA 12 k 2 k var R v + i var 0 RR ( 1 T ) α =+ v 6i 12 −= 0 At T 100 C; v 24 V: == var v 2R i 24 i6 4 m A 12 =− = var var 24 62R R 4 k 4 ==+ = > = Ω ACTIVITY 2-1 6 mA 12 k var R v + i var 0 ( 1 T ) v 12 = 0 At T 24 V: var v i var R4 k = 00 R( 1 100 ) ; R 2 k = 0 100 1; .01/ C αα => = = ACTIVITY 2-1 6 mA 12 k var R v + i var 0 ( 1 T ) 0 Part b) At T 1000 C Find v = var 0 R R (1 T) 2[1 .01(1000)] 22 k =+= + =Ω var vv 2 4 k i i2 4 = = >= v 4 8 V 12 24 = =
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C2-activities - ELECTRIC CIRCUITS ECSE-2010 Class 2...

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