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Assignment 1(Spring 2012)

Circuit Theory (Phy301)

Marks: 20

Due Date: 13th April, 2012

 

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Q 1:

Find the equivalent resistance of given circuit. Write each step of the calculation to get maximum marks. Draw the circuit diagram of each step otherwise you will lose your marks.  

 

 

 

 

 

 

 

 

 

 

 

Q 2:

       Find power dissipated through energy saver having resistance 12Ω, in given network.

 

 

 

 

 

 

 

 

 

 

Q 2: Answer the following questions.

  1.               I.      Why Copper wire is frequently used for conducting current?
  2.            II.      What causes positive and negative charge?
  3.          III.      When two uncharged particles come close to each other, will they repel or attract   each other?

 

 

 

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Replies to This Discussion

plaz discus here solution of the assignment 

Please Discuss here about this assignment.Thanks

kindly solve 1 and second q any 1 dont draw the circuit just solve it atleast

(64A)(12)=768watts 

uncharge particles neither attract nor repel 

lost of electrons cause positive charge and gain of electrons cause negative charge

plz koi toh phy 301 ki assignment send ker da aaj last data ha assignment ki plzzzz

q1 

solve 6||6 ohm by using parallel formula 3ohm 

add 4ohm and 4ohm in series and 5ohm and 3ohm in series that makes 8||8ohm solve by parallel formula equals 4ohm

now add 4+3+12ohm =19ohm 

now 19ohm||10ohm again use parallel formula 6.5 equivalent resistance

i may be wrong may be right check it by yourself and also if i am right or wrong

12 ohm say pahlay joo 0ohm wali line hay us ko app nay khan kar dia?

i khink 0ohm||12ohm    =0ohm then

now add 4+3+0ohm =7ohm

no resistance in that line so ignore it plus no 0ohm

QUESTION SOLUTION 
A-Copper wire is a durable, flexible type of wiring that is commonly used in many science experiments involving electricity. Copper wire is conductive, meaning that electricity can flow through it, and it is affordable, which makes it ideal for students who want to conduct science experiments without spending a lot of money. Because most science experiments with copper wire involve active electrical currents, they may not be appropriate for small children to conduct without adult supervision


Copper has a high conductivity. Annealed copper is the international standard to which all other electrical conductors are compared. The main grade of copper used for electrical applications, such as building wire, motor windings, cables and busbars, is electrolytic-tough pitch (ETP) copper (CW004A or ASTM designation C100140). This copper has an electrical conductivity of at least 101% IACS (International Annealed Copper Standard). If high conductivity copper needs to be welded or brazed or used in a reducing atmosphere, then oxygen-free high conductivity copper (CW008A or ASTM designation C10100) may be used. Because of its ease of connection by soldering or clamping, copper is still the most common choice for most light-gauge wires.



B-What causes positive and negative charge?

One property of matter is the electric charge. Most sub-atomic particles have either a positive (+) or negative (−) electrical charge. Those that don't are considered neutral.

The most common charged particles are the electron and proton. Atoms with an excess of electrons are called negative ions. Those with missing electrons are called positive ions. There is an electrical field that flows between opposite charges, causing an electrical force. This results in an attractive force between the opposite charges and a repelling force between like charge,


solution part c-

When two uncharged particles come close to each other, will they repel or attract each other?


Because electrons have a negative charge, other electrons that come near will be repelled. The same holds true for two positively charged protons. Like-charges will be repelled. However, if a positively charged proton comes along, it will be attracted to the electron. This occurs because the proton and electron hold opposite charges.
 

question 2 ka answer kya aya hay? mera 48 watts a raha hay. plz tell me mera answer theek hay ya nahi??

I. Why Copper wire is frequently used for conducting current?
Silver and gold are better conductors, but as copper is more abundant and it is not too expensive, copper is more commonly used.
Copper wire is also relatively easy to manufacture, and there is a long history of using it.

There are number of factors that could b the cause of positive or negative charge e.g.
Chemical Action , Heat , Light , Magnetic and Electric Fields.

II. What causes positive and negative charge?


III. When two uncharged particles come close to each other, will they repel or attract each other?
Because electrons have a negative charge, other electrons that come near will be repelled. The same holds true for two positively charged protons. Like-charges will be repelled. However, if a positively charged proton comes along, it will be attracted to the electron. This occurs because the proton and electron hold opposite charges.

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