1. Seat No.: _____ Enrolment No.________________
REAL DIPLOMA & ENGINEERING CLASSES
Diploma Engg. Semester-II Internal Exam 2013
Subject code:3320903
Subject Name: D.C.CIRCUIT
Date: 26/03/2013 Total Marks: 50
_________________________________________________________________________
Instructions
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. English version is Authentic.
QUE: 1 DO AS DIRECTED. (10)
1. Unit of electrical current is ________ or ________.
2. Electric potential of one point is 100 V. so, to move 4 coulomb charges to infinite
distance _______________ work is require.
3. 10M Ω = _________ mΩ.
4. Symbol of conductance is _____ & unit is _______.
5. One conductor has 4 times of length & diameter is double, resistance is ______.
6. How much 10Ω resistance is connected in parallel, and then its equivalent
resistance is 2Ω?
7. Define: temperature resistance co-efficient.
8. 30Ω three resistances are connected in delta, how much equivalent star
resistance?
9. Define: resistivity
10.5Ω two resistances are connected in parallel, equivalent resistance is ________.
QUE: 2 ANSWER THE FOLLOWING QUESTIONS. (10)
1. Explain conductance & conductivity.
2. Explain ohm’s law with its limitations.
3. Define Electro motive force & potential difference.
4. Explain conductor, insulator, and semi-conductor.
5. Define Norton’s theorem.
QUE: 3 ANSWER THE FOLLOWING QUESTIONS. (15)
1. Explain Kirchhoff’s law.
2. Factors affecting on resistance.
3. Explain series connection & parallel connection.
4. Define Thevenin’s theorem & how to solve it?
5. Evaluate delta to star transformation.

2. QUE: 4 DO AS DIRECTED. (15)
1. When two resistances are connected in parallel its equivalent resistance is 30Ω
and same resistances are connected in series its equivalent resistance is 160Ω.
Then find value of each resistance.
2. Use of electricity in home shown as bellow. Per unit cost 3 Rs. Find electricity bill
for 30 days.
1. 40W 4 tube light use 6 Hr. every day
2. 2000W heater use 0.5 Hr. every day
3. 500W pump use 0.5 Hr. every day
4. 60W 3 fan use 7 Hr. every day
3. Solve fig (1) using thevenin’s theorem.
4. Solve fig (2) using Norton’s theorem.
5. Conductor has 5 mm diameter & 10 m length. Conductance of conductor is
115.5 simence. find conductivity of conductor.