Wire C and wire D are made from different materials and have length Lc = Lp = 2.4 m. The resistivity and diameter of wire C are 5.0 × 10-6 Q.m and 1.32 mm, and those of wire D are 1.2 × 106 Q2•m and 0.79 mm. The wires are joined as shown in the figure and a current of 4.9 A is set up in them. What is the electric potential difference between (a) points 1 and 2 and (b) points 2 and 3? What is the rate at which energy is dissipated between (c) points 1 and 2 and (d) points 2 and 3? C ·Lc (a) Number i 4.3e-5 Units V (b) Number 2.9E-5 Units V (c) Number i 2.1e-4 Units W 2 (d) Number i 1.4e-4 Units W D -LD 3

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Chapter1: Units, Trigonometry. And Vectors
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Wire C and wire D are made from different materials and have length Lc = Lp = 2.4 m. The resistivity and diameter of wire C are 5.0 ×
10-6 Q.m and 1.32 mm, and those of wire D are 1.2 × 106 Q2•m and 0.79 mm. The wires are joined as shown in the figure and a current
of 4.9 A is set up in them. What is the electric potential difference between (a) points 1 and 2 and (b) points 2 and 3? What is the rate at
which energy is dissipated between (c) points 1 and 2 and (d) points 2 and 3?
C
·Lc
(a) Number i 4.3e-5
Units
V
(b) Number
2.9E-5
Units
V
(c) Number i 2.1e-4
Units
W
2
(d) Number i
1.4e-4
Units
W
D
-LD
3
Transcribed Image Text:Wire C and wire D are made from different materials and have length Lc = Lp = 2.4 m. The resistivity and diameter of wire C are 5.0 × 10-6 Q.m and 1.32 mm, and those of wire D are 1.2 × 106 Q2•m and 0.79 mm. The wires are joined as shown in the figure and a current of 4.9 A is set up in them. What is the electric potential difference between (a) points 1 and 2 and (b) points 2 and 3? What is the rate at which energy is dissipated between (c) points 1 and 2 and (d) points 2 and 3? C ·Lc (a) Number i 4.3e-5 Units V (b) Number 2.9E-5 Units V (c) Number i 2.1e-4 Units W 2 (d) Number i 1.4e-4 Units W D -LD 3
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