Electrical Machines Current in a coil undergoing commutation is not able to get reversed completely by the end of commutation period. It is due to reactance voltage induced in the coil. None of these coil resistance. armature emf. reactance voltage induced in the coil. None of these coil resistance. armature emf. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An 8 pole DC generator has 500 armature conductors and useful flux per pole of 0.065 Wb. What will be the emf generated if it is lap connected and runs at 1000 rpm. What must be the speed at which it is driven to produce the same emf if it is wave wound? 541.67V, 200 rpm. 2166.67V, 230 rpm. 541.67V, 250 rpm. 2166.67V, 270 rpm. 541.67V, 200 rpm. 2166.67V, 230 rpm. 541.67V, 250 rpm. 2166.67V, 270 rpm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An electric motor with constant output power will have a torque speed characteristics in the form of a Straight line through the origin. Circle about the origin. Straight line parallel to the speed axis. Rectangular hyperbola Straight line through the origin. Circle about the origin. Straight line parallel to the speed axis. Rectangular hyperbola ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two identical loss less series motors connected in series across a dc supply voltage, runs at speed of N1 and N2, then ratio of their output power is N12 : N22. none. N1 : N2. 1 : 1. N12 : N22. none. N1 : N2. 1 : 1. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine the armature mmf is rotating with respect to field poles. stationary with respect to armature. rotating with respect to field poles as well as armature. stationary with respect to field poles. rotating with respect to field poles. stationary with respect to armature. rotating with respect to field poles as well as armature. stationary with respect to field poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For pure resistive load what is the armature reaction? All of these demagnetization magnetization cross magnetization All of these demagnetization magnetization cross magnetization ANSWER DOWNLOAD EXAMIANS APP
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