Admin Administrator Staff member May 23, 2022 2,464 96 48 Aug 6, 2023 #1 A motor whose armature resistance is 2Ω is operated on a 240V mains supply. Given the back emf in the motor is 220V. Calculate; the current through the armature. the efficiency of the motor.
A motor whose armature resistance is 2Ω is operated on a 240V mains supply. Given the back emf in the motor is 220V. Calculate; the current through the armature. the efficiency of the motor.
Admin Administrator Staff member May 23, 2022 2,464 96 48 Aug 6, 2023 #2 Admin said: A motor whose armature resistance is 2Ω is operated on a 240V mains supply. Given the back emf in the motor is 220V. Calculate; the current through the armature. the efficiency of the motor. Click to expand... (i) 𝑹𝑨 = 𝟐𝛀, 𝑬 = 𝟐𝟒𝟎𝑽, 𝑬𝑩 = 𝟐𝟐𝟎𝑽 𝑬 − 𝑬𝑩 𝑰𝑨 = 𝑹 𝑨 𝟐𝟒𝟎 − 𝟐𝟐𝟎 𝑰𝑨 = 𝟐 𝟐𝟎 𝑰𝑨 = 𝟐 𝑰𝑨 = 𝟏𝟎𝑨
Admin said: A motor whose armature resistance is 2Ω is operated on a 240V mains supply. Given the back emf in the motor is 220V. Calculate; the current through the armature. the efficiency of the motor. Click to expand... (i) 𝑹𝑨 = 𝟐𝛀, 𝑬 = 𝟐𝟒𝟎𝑽, 𝑬𝑩 = 𝟐𝟐𝟎𝑽 𝑬 − 𝑬𝑩 𝑰𝑨 = 𝑹 𝑨 𝟐𝟒𝟎 − 𝟐𝟐𝟎 𝑰𝑨 = 𝟐 𝟐𝟎 𝑰𝑨 = 𝟐 𝑰𝑨 = 𝟏𝟎𝑨
