Electrical Machines If B is flux density, l the length of the conductor and v the velocity of the conductor, then emf is given by Blv. Bl2v. Blv2. Bl2v2. Blv. Bl2v. Blv2. Bl2v2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor has which of the following characteristics? Can be started easily without load. Has its field winding consinting of thick wire and less no of turns. Has a almost constant speed. Has a poor torque. Can be started easily without load. Has its field winding consinting of thick wire and less no of turns. Has a almost constant speed. Has a poor torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For which of the following loads, armature reaction is magnetizing in nature? None of these pure capacitive load pure resistive load pure inductive load None of these pure capacitive load pure resistive load pure inductive load ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements: To control the speed of a dc shunt motor above the base speed over a reasonably wide range, the motor must 1. have compensating winding 2. have interpole winding 3. be started using a 3-point starter 4. be started using a 4-point starter Of these statements 1 and 3 are correct 1, 2 and 4 are correct 1, 2 and 3 are correct 2 and 4 are correct 1 and 3 are correct 1, 2 and 4 are correct 1, 2 and 3 are correct 2 and 4 are correct ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine current and emf at the terminals are alternating. emf in armature conductors and at the terminals is alternating. current and emf in armature are unidirectional current and emf in armature are alternating. current and emf at the terminals are alternating. emf in armature conductors and at the terminals is alternating. current and emf in armature are unidirectional current and emf in armature are alternating. 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? 2166.67V, 230 rpm. 541.67V, 200 rpm. 2166.67V, 270 rpm. 541.67V, 250 rpm. 2166.67V, 230 rpm. 541.67V, 200 rpm. 2166.67V, 270 rpm. 541.67V, 250 rpm. ANSWER DOWNLOAD EXAMIANS APP
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