Engineering Materials in EE What is the value of dielectric constant of air? Less than 1 none of these. 0. 1. Less than 1 none of these. 0. 1. ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials in EE When a ferromagnetic substance is magnetized small changes in dimensions occur. Such a phenomenon is known as magnetic hysteresis. magnetostriction. magneto-calorisation. magnetic expansion. magnetic hysteresis. magnetostriction. magneto-calorisation. magnetic expansion. ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials in EE In electrical machines the material preferred for pole shoes of electromagnets is lead. pure iron. copper. aluminium. lead. pure iron. copper. aluminium. ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials in EE The number of rings in the Bohr model of any element is determined by what? Column number on periodic table. Atomic mass. Atomic number. Row number on periodic table. Column number on periodic table. Atomic mass. Atomic number. Row number on periodic table. ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials in EE In order to minimise loss due to hysteresis, the magnetic material should have high retentivity. large B-H loop area. high resistivity. low hysteresis coefficient. high retentivity. large B-H loop area. high resistivity. low hysteresis coefficient. ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials in EE The permeability of iron can be increased by purifying it. alloying with cobalt. increasing carbon percentage. reducing carbon percentage. purifying it. alloying with cobalt. increasing carbon percentage. reducing carbon percentage. ANSWER DOWNLOAD EXAMIANS APP
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