Engineering Materials in EE Cryogenics is a branch of science dealing with which of the following? Crystal growth. Friction and wear. Low temperature. High temperature. Crystal growth. Friction and wear. Low temperature. High temperature. 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 expansion. magnetostriction. magnetic hysteresis. magneto-calorisation. magnetic expansion. magnetostriction. magnetic hysteresis. magneto-calorisation. ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials in EE In electrical machines the material preferred for pole shoes of electromagnets is copper. pure iron. aluminium. lead. copper. pure iron. aluminium. lead. ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials in EE Find the odd one out. Emissivity. Dielectric strength. Absorptivity. Refractive index. Emissivity. Dielectric strength. Absorptivity. Refractive index. ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials in EE Which of the following gives materials in order of decreasing values of permeability? Pure iron, silicon iron, aluminium, bismuth. Cobalt, nickel, aluminium, iron. Silver, copper, aluminium, iron. Permalloy, nickel, air, water. Pure iron, silicon iron, aluminium, bismuth. Cobalt, nickel, aluminium, iron. Silver, copper, aluminium, iron. Permalloy, nickel, air, water. ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials in EE In order to minimise loss due to hysteresis, the magnetic material should have large B-H loop area. high resistivity. low hysteresis coefficient. high retentivity. large B-H loop area. high resistivity. low hysteresis coefficient. high retentivity. ANSWER DOWNLOAD EXAMIANS APP