Q5. (A) Select the correct answer for the alternatives given 1- In transformer, the load current at maximum efficiency is equal to rated load current multiplied by a) Pi Pcu Pi b) [P] 12 Pcu c) Pi d) Pcu 2- When a series de motor is operated without a load, which of the following conditions occur? a) The armature draws excessive current c) The armature will not turn b) The voltage requirement increases d) The armature speeds out of control 3-A 220V shunt motor develops a torque of 216 N.m at an armature current of 40 A. The torque developed when the armature current is 20 A a) 432 N.m b)108 N.m A single phase transformer has maximum effici c) 864 N.m d) SAN
Q5. (A) Select the correct answer for the alternatives given 1- In transformer, the load current at maximum efficiency is equal to rated load current multiplied by a) Pi Pcu Pi b) [P] 12 Pcu c) Pi d) Pcu 2- When a series de motor is operated without a load, which of the following conditions occur? a) The armature draws excessive current c) The armature will not turn b) The voltage requirement increases d) The armature speeds out of control 3-A 220V shunt motor develops a torque of 216 N.m at an armature current of 40 A. The torque developed when the armature current is 20 A a) 432 N.m b)108 N.m A single phase transformer has maximum effici c) 864 N.m d) SAN
Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter3: Power Transformers
Section: Chapter Questions
Problem 3.9P
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