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Electronics and Communication Analog Electronics Difficulty: Medium

A power transfer used in class A amplifier has zero signal power dissipation of 10 Watts. If the AC power is 4 W. Calculate collector efficiency. Electronics are characterized by . . . . . . . . From a solution of wave equation in a conducting medium we can determine various parameters. In the light of this, match List-I with List-II and select the correct answer using the options given below the lists: List-I (Parameter) List-II (Expression) a. Propagation constant 1. $${\left( {\frac{2}{{\omega \mu \sigma }}} \right)^{\frac{1}{2}}}$$ b. Skin depth 2. $${\left( {\frac{{\omega {\mu _0}}}{{2\sigma }}} \right)^{\frac{1}{2}}}$$ c. Sheet resistance 3. $${\left( {j\omega {\mu _0}\sigma } \right)^{\frac{1}{2}}}$$ 4. $${\left( {\frac{{\omega {\mu _0}\sigma }}{2}} \right)^{ - \frac{1}{2}}}$$ Materials, whose specific resistance abruptly falls at very low temperature, are called Reduce the Boolean equation $${\text{AB}} + {\text{ABC}} + \overline {\text{A}} {\text{B}} + {\text{A}}\overline {\text{B}} {\text{C}}$$