Page 257 - Basic Electrical Engineering
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Figure 2.174
[Ans 2 A]
46. A winding wire made of copper has a resistance of 80 Ω at 15°C. Calculate its resistance at 50°C.
Temperature coefficient of copper is 0.004/°C at 0°C.
[Ans 90.6 Ω]
47. A copper wire of certain length has resistance of 4.5 Ω. Another copper wire has thrice its length
and twice its cross-sectional area. What will be the value of resistance of the second wire?
[Ans 6.75 Ω]
48. Calculate the equivalent resistance of the network across the terminals A and B.
Figure 2.175
[Ans R AB = 4 Ω]
49. Calculate the current supplied by the battery in the circuit shown in Fig. 2.176.
