viva questions for four probe experiment

So, here are more than 7 questions you can prepare for in advance of your PhD viva: You can now check out this post too for 67 practice viva questions!. : +91-1332-272852, 277118 Fax: +91-1332-274831 Email: ses@sestechno.com Four point probe method is used straightly for resistivity measurement. … Theory: In a crystalline solid as a result of interaction between tremendous numbers of atoms in the crystal the energy levels are split up and form bands of allowed energy which contains almost continuum of levels. 1. 43. 39. What are the functional units of a computer? The 4-point probe setup used in the EECS 143 instructional lab consists of four equally spaced tungsten metal tips with finite radius. 31. 32. Input unit, memory unit, arithmetic and logic unit, output unit and control unit. 46. 2. About the Author. CAO LAB VIVA Questions with Answers :-1. 40. 44. 30. Objective: To determination of the band-gap of the semiconductor using the four probe method. 41. What are the types of computer? ... of undesired frequency or amplitude changes in the source itself as a result of interaction of oscillator or probe. ), four probe arrangement [distance between probes (S) = 0.2 cm. The reason using four probes instead of two by having force and sense probes is to eliminate contact resistance and increase accuracy. 37. 45. The four points probe, as depicted schematically in fig.1, contains four thin collinear probes are made to contact the sample under test. Viva Questions Mar 16, 2017 Mar 16, 2017 Manas Sharma The following are some of the frequently asked questions for Viva of the Four Probe Experiment, … The classic starter question to summarise your research. 38. Ans. It is a substance with conduction properties between metals and insulators. Summarise your thesis/research in 3 minutes. Previous Next Post . 36. 29. What is meant by intrinsic semiconductor ? Q.2. These books contain exercises and … 3. 47. 34. Current I am made to flow between to outer probes, and voltage Vis measured between the outer probes and voltage V is measured between the two inner probes, ideally without drawing any current. Microwave Lab Viva Questions With Answers Familiarization of microwave components. 1. Personal computer, notebook computer, workstations, enterprise or mainframes. Each tip is supported by springs on the other end to minimize sample damage during probing. A pure semiconductor completely free from impurities is called intrinsic semiconductor. Q.3. 35. Current I is passed through the outer probes (1 & 4) and the floating potential V is measured approx the inner pairs of probes 2 & 3. ], oven and thermometer. The four metal tips are part of an auto-mechanical stage which travels up and down during measurements. In four probe method, do we 'have' to mearure the potential drop between the center 2 terminals, or, could we swap the functions of the probes... Also, can we, (theoreticaly), alter the distances between the probes which measure voltage, instead of all the probes … VIVA VOCE QUESTIONS - SEMICONDUCTORS Q.1.What is a semiconductor ? Ge single crystal (n type with thickness (w) = 0.05 cm. . Download our four probe experiment viva questions eBooks for free and learn more about four probe experiment viva questions. Physics Lab Viva Questions. 42. 33. THEORY: In figure four probes are spaced S1, S2, S3 and S4 apart. Ans. RESISTIVITY OF SEMICONDUCTORS BY FOUR PROBE METHOD AT DIFFERENT TEMPERATURES Manufactured by . Viva Questions. Next Prev Post. Scientific Equipment & Services 358/1, New Adarsh Nagar, Roorkee - 247 667, UA, INDIA Ph. Our four probe experiment viva questions eBooks for free and learn more four! 0.2 cm the source itself as a result of interaction of oscillator probe! Minimize sample damage during probing Q.1.What is a substance With conduction properties between metals and.! 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