MDCAT PHYSICS TOPIC: 9

UNIT:9

                                  BOOK CHAPTER: 17 ,18

ü Stress, strain and young modulus, Hook’s law:

Read complete article 17.2 till page 140.Definitions, formulae and symbols.Clear understandings regarding  stress and strain.                                                                                                                                                                           Memorize all important formulae and practice their variations.                                                                            Definition and application of hook’s law is important.

ü Elastic and plastic deformation: (v.v.imp Article)

Read article “elastic limit and yield strength” on page no. 140. Memorize all important definitions and symbols. Make clear concept regarding brittle and ductile substance.                                           Figure 17.4 is very important. Table 17.1 is important. Memorize important values.

ü Strain energy:

Read article “strain energy in deformed meterials”. Memorize formula of work done and practice variations. Memorize important lines and practice MCQS.                                                                                           Figure 17.5 is very important.

ü Band theory:

Read article “energy band theory”. Make clear cut concept regarding valence es and conductinges.                                                                                                                                                                                                          Make clear understandings of conductors, semiconductors and insulators.

Figure 17.6,17.7,17.8 are very important.

ü Important topics:

Modulus,Band theory,Strain Energy.

ü Other important and concept building concepts:

Article 17.1.

                                   

 

 

 

 

                               Electronics (chapter 18)

ü Half and full wave refraction:

Read articles 18.1 and 18.2. Clear understandings regarding forward biased and reverse biased.   P-n junction and potential barriers is important. Leakage current and forward resistance.                        Half and full wave reflection is most important. Time period and frequency of output signal is important.                                                                                                                                                                                            Must consult notes.                                                                                                                                               Figure 18.1,18.3,18.7,18.6 is important. Question 18.12 is very important.

ü Operational amplifiers and its characteristics:

Read article 18.7. Memorize various conventions. Open loop gain is important.                                               Figure 18.23,18.27 are very important. Read articles 18.8 and 18.9.                                                                Memorize just formulae and practice different MCQS. Law of virtual ground is important.                                                                                                                                                             Phase change cross amplifiers is important. Must consult notes.                                                                            Example 18.2 s very important. Figure 18.28,18.29,18.30 is important. Problems 18.4,18.5 are important.

ü Important articles:

Operational amplifier,Rectification.