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Explain Resistivity.
Resistivity: Resistance R of a wire containing cross-sectional area A and length L maintain the relationship, - R α L and R α 1/A; that is resulting R α L/A or say R = ρ L / A; here ρ is the constant of proportionality and is termed as resistivity of a material and is termed as the resistance among the two opposite faces of a meter cube of that material. This unit of resistivity is ohm-m. Factors influencing resistivity are alloying, temperature and mechanical stressing and ageing.
An eight pole dc generator has an armature wound with 768 conductors each capable of carrying 50A without overheating. The emf generated in each conductor is 1.5V. Calculate the th
Hall Effect is associated with (A) Conductors. (B) Semiconductors. (C) Thermistors. (D)Solders. Ans: Hall Effect is associated with semiconductors.
Q. With a circuit diagram explain how a transistor in common-base configuration amplify signals. The common-base terminology is derived from the fact that the base is common t
A three-phase, wye-connected, cylindrical-rotor synchronous generator rated at 10 kVA and 230 V has a synchronous reactance of 1.5per phase and an armature resistance of 0.5 pe
What is ohmmeter An ohmmeter is an instrument for measuring resistance
Explain signal description of 8085 a) Address bus b) Control and status signal c) Address latch enable d) S1,S0 status signals e) Read ,write signal
Q. A 60-Hz, 440-V, three-phase system feeds two balanced wye-connected loads in parallel. One load has a per-phase impedance of 8 + j3 and the other 4 - j1 . Compute the real po
Q. Show the Complement Representation? There are two types of complements for each number system. r's and (r-1)'s complement ex. decimal
how much transformer oil is used in transformers
How to convert mechanical energy into electrical energy
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