Electrical Machines Addition of 0.3 % to 4.5 % silicon to iron increases the electrical resistivity of iron. increases the hysteresis loss. None of these reduces the saturation magnetization. increases the electrical resistivity of iron. increases the hysteresis loss. None of these reduces the saturation magnetization. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor is accidentally connected to single phase ac supply voltage. The torque produced will be pulsating and unidirectional oscillating None of these steady and unidirectional pulsating and unidirectional oscillating None of these steady and unidirectional ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Flashing of DC generator means creation of residual magnetism by a DC source. None of these increasing flux density by providing extra ampere-turns in field. neutralization of residual magnetism. creation of residual magnetism by a DC source. None of these increasing flux density by providing extra ampere-turns in field. neutralization of residual magnetism. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machine shape of main field flux distribution is? triangular saddle shape flat tapped or trapezoidal peaky in nature triangular saddle shape flat tapped or trapezoidal peaky in nature ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Short circuiting is caused in the armature winding due to any of above. failure of insulation between two commutator bars. grounding of two or more turns of the same coil. failure of insulation between two turns of coil. any of above. failure of insulation between two commutator bars. grounding of two or more turns of the same coil. failure of insulation between two turns of coil. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single-phase transformer has its maximum efficiency at 60 percent of full load. At full load copper loss will be zero. equal to core loss. more than core loss. less than core loss. zero. equal to core loss. more than core loss. less than core loss. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS