Engineering Materials in EE When a ferromagnetic substance is magnetized small changes in dimensions occur. Such a phenomenon is known as magnetostriction. magneto-calorisation. magnetic hysteresis. magnetic expansion. magnetostriction. magneto-calorisation. magnetic hysteresis. magnetic expansion. ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials in EE What are insulating materials that can tolerate maximum temperature? Glass. Mica. All of these. Porcelain. Glass. Mica. All of these. Porcelain. ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials in EE A ferrite core has low eddy current loss than an iron core because ferrites have low permeability. ferrites have hig hysteresis. / >ferrites have high resistance. ferrites are magnetic. ferrites have low permeability. ferrites have hig hysteresis. / >ferrites have high resistance. ferrites are magnetic. ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials in EE In electrical machines the material preferred for pole shoes of electromagnets is copper. aluminium. lead. pure iron. copper. aluminium. lead. pure iron. ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials in EE Which of the following is the example for piezo-electric material ? None of these Lead zirconate titanate Copper Potassium niobate None of these Lead zirconate titanate Copper Potassium niobate ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials in EE Which of following material has least value of dielectric constant? Paper. Ceramics. Oil. Glass. Paper. Ceramics. Oil. Glass. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS