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PHY301 Circuit Theory Assignment No 1 Solution and Discussion due date; 17-11-2014

PHY301 Circuit Theory Assignment No 1 Solution and Discussion due date; 17-11-2014


Assignment 1 (Fall 2014)                                                           

Circuit Theory (Phy301)

Marks: 30

Due Date: November 17, 2014


Don’t miss these important instructions:


  • To solve this assignment, you should have good command over first 6 lectures.        
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  • Don’t wait for the last date to submit your assignment.
  • You can draw circuit diagrams in “Paint” in “MS Visio” or in circuit maker. The simple and easy way is to copy the given image in “Paint” and do the required changes in it.    



Q. No: 1

A 30V battery is attached to a circuit containing 2 resistors and a fan having 3Ω resistance.      Marks 12


1)      Calculate the source current Is.

2)      Determine the voltages V1, V2, and V3.

3)      Calculate the power dissipated by each resistor.

4)      Determine the power delivered by the source, and compare it to the sum of the power levels of part (4)












Q. No: 2    

Find the equivalent resistances RT of given circuit. Write each step of the calculation to get maximum marks. Draw the circuit diagram of each step otherwise you will loose marks.        Marks 10



















Q. No: 3   

      Answer the following short questions.     Marks 8                                                                                                       



  1.               I.      An energy saver, of 25 watts is connected across 220V energy source. Calculate the current flowing through it.
  2.            II.      Give two examples of closed circuit and open circuit from daily life.
  3.          III.      Given below are some materials. Mention the conductor, semiconductor and Insulator from them.

            Silicon, Silver, iron, carbon, glass, copper, rubber.


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Replies to This Discussion

sahi hai aik dum..................

Q. No: 3  

      Answer the following short questions.    

An energy saver, of 25 watts is connected across 220V energy source. Calculate the current flowing through it.

By using P = V I          …. Changing   we get for current I = P / V

V= 220V    P = 25 watts

I = 25 / 220     =  0.11 A

Closed Circuit:

A circuit is considered to be closed when electricity flows from an energy source to the desired endpoint of the circuit. A complete circuit which is not performing any actual work can still be a closed circuit. For example, a circuit connected to a dead battery may not perform any work, but it is still a closed circuit.

in short (proper connections are there.)

Open Circuit:

Any circuit which is not complete is considered an open circuit. The open status of the circuit doesn't depend on how it became unclosed, so circuits which are manually disconnected and circuits which have blown fuses, faulty wiring or missing components are all considered open circuits.

in short (jis ka connections poray na hon like toota howa circuit)

Phy301 Assignment Solution



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