SHANKERSINH VAGHELA BAPU INSTITUTE OF TECHNOLOGY, VASAN
ELEMENTS OF ELECTRICAL ENGINEERING
ASSIGNMENT 1:
DC CIRCUIT
1) State and explain Kirchhoff’s voltage and current laws.
2) Explain effect of temperature on resistance. Define temperature co-efficient & obtain
expression αt2 =
1
——————
1/ αt1 + (t2-t1)
3) Why are domestic appliances connected in parallel
4) Derive expression for delta to star conversion of resistive network
5) Define temperature co-efficient of resistance. How resistances of different materials
vary with temperature? Prove that αt = α0/(1+ α0t)
6) Prove Rt2 = R t1 [1 + α1 (t2-t1)], where notations have usual meanings
7) A carbon colour coded resistor has first ring of orange, second of blue, third of red
and fourth of golden colour. Find the specifications of the resistor.
8) Define temperature co-efficient of resistance. How does the resistance of different
materials vary with temperature? Prove that α t = α0/(1+ α0t)
9) Explain the factors affecting the resistance of a conducting material
10) Define :





current
Conventional current
Charge
Electric potential
Power
Electrical energy
11)Determine the equivalent resistance between the terminals A and B of
network shown in figure 1.
SHANKERSINH VAGHELA BAPU INSTITUTE OF TECHNOLOGY, VASAN
ELEMENTS OF ELECTRICAL ENGINEERING