II_I Mech ---
1. Explain the working principle of operation of PMMC instrument with neat circuit diagram ?
2. With the help of neat sketches, describe the construction and working of various parts of a cathode ray tube? Explain how a frequency can be measured using a CRO?
3. Describe the operation of NPN transistor? Write the various applications of SCR?
4. What is a PN junction diode ? Draw V-I characteristics when it is (i) Forward Biased (ii) reversed Biasedb. write some applications of SCR?
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