1. Tutorial – 1:
DC Circuit Analysis

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. 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. 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. 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. 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. 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]