Seat No.: _____ Enrolment No.________________

REAL DIPLOMA & ENGINEERING CLASSESDiploma Engg. Semester-II Internal Exam 2013

Subject code:3320903

Subject Name: D.C.CIRCUITDate: 26/03/2013 Total Marks: 50_________________________________________________________________________

Instructions1. 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: resistivity10.5Ω 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.

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 day2. 2000W heater use 0.5 Hr. every day3. 500W pump use 0.5 Hr. every day4. 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.