to setup a common base transistor circuit and to study its input and output characteristics and to calculate its current gain

please help me in my physics project on set up of common base transistor circuit to study its input and output character

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(08-06-2015, 12:28 PM)Guest Wrote: please help me in my physics project on set up of common base transistor circuit to study its input and output character

ACKNOWLEDGEMENTS in the realization of this project successfully, many people have the best property on me their blessings and promised heart support, this time I'm using to thank all those who have been affected by project. Mostly I thank God to be able to carry out this project successfully. Then, I want to thank my Director Mr. SVBabu and physics professor Mr.Ramna Rao, the valuable tips were those who helped me to patch this project and make success evidence complements its suggestions and instructions served as a major contributor towards the end of the project. Secondly, I would like to thank my parents and friends who helped me with their valuable suggestions and advice has been helpful in different phases of the project. Last but not least, I wish to thank my comrades who helped me a lot.
4 INDEX 1.CERTIFICATE OF EXCELLENCE 2. RECOGNITION 3. AIM OF THE PROJECT 4. INTRODUCTION 5. THEORY 6. REQUIRED UNIT 7. PROCEDURE FOLLOWED 8. COMMENT 9. CONCLUSION 10. PRECAUTION 11. BIBLIOGRAPHY
5 INTRODUCTION the transformer is a device used to convert a low AC voltage to a high AC voltage or vice versa. A transformer based on the principle of mutual induction according to this principle, the amount of magnetic flux linked to spool change-an e.m.f is induced in the neighbouring coil. A transformer is an electrical device that is used to change the current voltages AC. A transformer is the most widely used device in the circuit of current at a low time and high. As these transformers are built in an amazing force of sizes. In electronic measuring and control circuits, the size of the transformer may be so low that it weighs only a few tens of grams whereas in high voltage electric circuits, it can weigh hundreds of tons. In a transformer, the transfer of electrical energy from one circuit to another circuit is done without the use of moving parts. A transformer that increases voltage is called a transformer by alliance upwards. A transformer that reduces tensions in current alternative is called a step-down transformer. Transform is therefore an essential element of the device both for the current circuit current and strong low. OBJECTIVE to evaluate the relationship between the ratio of - 1. Input and output voltage. 2. number of chips in the secondary coil and the primary winding of a self made transformer.
6. when an altering e.m.f. is provided to the primary coil P1P2, alternating current begins to fall in. The alteration in the primary current produces a variable magnetic flux which induces a voltage change in primary and secondary schools. In a transformer goodwill, all magnetic flux linked to primary is also linked to the secondary, then the induced e.m.f. induced in each spire school is equal to that which is induced in each coil of the primary. Thus, if Ep and Es are the instantaneous values of the e.m.f. of induced in primary and secondary and Np and Ns are not. coils of the transformer primary side coils and dф / dt = rate of change of flux in each branch of the coil at this moment, we have Ep = - Np dф / dt _ (1) and Es = - ns dф / dt _ (2) given that the above relations are real from moment to moment, so dividing 2 by 1, we get Es / Ep = - Ns / Np _ (3).
7. as Ep is the instantaneous value of return induced e.m.f in the primary coil p1, so instant in the primary coil current is due to the difference (E - Ep) in the instant application values and back e.m.f. in addition, if Rp is the o resistance, coil p1p2, the instantaneous current Ip in the primary coil is given by Ip = E - Ep / Rp E - Ep = Ip Rp when primary resistance is low Rp Ip can be neglected as well and consequently E - Ep = 0 or Ep = E thus fcem = input fem equation therefore 3 can be written as Es / Ep = Es / E = output GEF / entry GEF = Ns / Np = K where K is a constant, called the tour or the transformation ratio.
8. in a TRANSFORMER STEP-DOWN Es < E to K &lt; 1, where Ns < Np if Ip = current value primary at the same instant and Is = current value secondary at this time, the power, then enter at the moment = PE Ip and the power output at the same time = if there is not power in the transformer losses, then power = power input output gold Ep = Ip is or / Ep = Ip / Is = K
9. in a step-UP transform Es &gt; E for K &gt; 1, where Ns &gt; Np as, k &gt; 1, then Ip &gt; is or &lt; Ip to say current in the secondary is lower when the output voltage is higher. By consequences