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# T1 basic circuits

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### T1 basic circuits

1. 1. Tutorial – 1: DC Circuit Analysis
2. 2. ELE 101 / 102 Dept of E & E Engg, MIT Manipal 2 [1] The resistance of a coil of wire increases from 50 Ω at 15° C to 58 Ω at 55° C. Calculate the temperature coefficient of resistance at 0° C Ans: 0.004255 °C-1 Exercises
3. 3. ELE 101 / 102 Dept of E & E Engg, MIT Manipal 3 Exercise [2] An Aluminium wire of 7.5 m long is connected in parallel with a copper wire of 6 m long. When a current of 5 A is passed through the combination, it is found that the current in the Aluminium wire is 3 A. The diameter of the Aluminium wire is 1 mm. Determine the diameter of the copper wire. Resistivity of copper is 0.017 µΩ m; that of Aluminium is 0.028 µΩ m [0.569 mm]
4. 4. ELE 101 / 102 Dept of E & E Engg, MIT Manipal 4 1 8 0 V 8 Ω 4 Ω 1 2 Ω 1 0 Ω 1 2 Ω 3 4 Ω 3 0 Ω 1 3 Ω 1 7 Ω 3 0 Ω F ig 1 Exercises [3] For the circuit shown in Fig 1, using network reduction techniques, determine the current through the 10 Ω resistor Ans: 6 A
5. 5. ELE 101 / 102 Dept of E & E Engg, MIT Manipal 5 Exercise [4] Using source transformation technique, reduce the circuit below to a single voltage source and resistance across AB. [10.636V, 2.18Ω] + - +- +- 2 A 6 V 3 Ω 1 0 V 2 Ω 4 V 6 Ω 9 A 0 . 5 A A B
6. 6. ELE 101 / 102 Dept of E & E Engg, MIT Manipal 6 Exercise [5] Using source transformation, determine the value of current source I if the power dissipated by the 5 Ω resistor is 15W. [1.8 A]
7. 7. ELE 101 / 102 Dept of E & E Engg, MIT Manipal 6 Exercise [5] Using source transformation, determine the value of current source I if the power dissipated by the 5 Ω resistor is 15W. [1.8 A]