This is revised syllabus 12th standard Physics Practical Book for download. Some of As the PDF file of this booklet is very large in size, please be patient while. Where can I download the physics practical experiments for class 12 (CBSE board)?. Views . How can I download Nootan Physics Class 12 book in PDF?. To master the science of physics practical one needs to have a complete and we would like to thank all those who have helped us in preparing this book.
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Previously there were two papers for each subject in class The board also decided to introduce only one paper. This will reduce the number of final board examination days.
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The interchange takes care of unaccounted resistance offered by terminals. Measurement of diameter of wire of unknown resistance Least count of the screw gauge L. Materials Required: Sonometer with non-magnetic wire brass wire stretched over it, step-down transformer of volts, horse shoe magnet, meter scale, screw gauge and half kg weights.
Theory: The frequency of A. C mains, while the secondary to the two ends of the sonometer wire. Note the distance l between the two bridges. Hz ii from graph Nearly zero resistance is offered to the flow of current. Nearly zero current flow in this condition.
Procedure: 1 Connect the ckt. Theory: A Zener Diode is constructed for operation in the reverse breakdown re-gion. Vz0 is the voltage at which the straight-line approximation of the I-V characteristic intersects the horizontal axis. After reaching a certain voltage, called the breakdown voltage, the current increases widely even for a small change in voltage. However, there is no appreciable change in voltage.
So, when we plot the graph, we should get a curve very near to x-axis and almost parallel to it for quite sometime. After the Zener potential Vz there will be a sudden change and the graph will become exponential. Draw a neat circuit diagram as shown in figure. Connect all the components by leads and ensure that the Zener diode is reverse biased.
Also ensure that milliammeter is connected in series with Zener diode having protective resistance and voltmeter is connected in parallel with Zener diode. Now adjust the slider of rheostat so that the power supply shows minimum potential. Switch on the power supply and gradually increase the potential difference applied across the Zener diode and note the reading of potential difference from voltmeter also note corresponding value of reverse current in milliammeter.
Increase the value of applied potential difference in the steps of 0.
Continue increasing the potential difference till you get a sudden increase in the reverse current in microammeter. The reverse potential corresponding to this value of reverse. Take the observations near the breakdown voltage by varying applied potential difference in the steps of 0.
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Record all the observations in the table given. Plot the graph between V and I as shown.
Take the value of V, corresponding to I, where it suddenly increases. This value of V, is called Zener voltage or Breakdown voltage Vz. Theory: An NPN transistor can be considered as two diodes with a shared anode region. In typical operation, the emitterbase junction is forward biased and the base collector junction is reverse biased. The electrons in the base are called minority carriers because the base is doped p-type which would make holes the majority carrier in the base.
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Physics Practical Notes For Class 12th PDF
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Published in: Full Name Comment goes here.Vedantu gives you the edge: At Vedantu, it is our continued effort to bring the best teaching experience to the students and assist them in all possible ways to excel in the exams. If the galvanometer shows deflection on both sides of its zero mark for these two points of contact of the jockey, null point will be somewhere on the wire AC. Take at least three sets of observations for balance point lying between 30 cm and 70 cm.