engineering recuitment UKPSC Polytechnic Lecturer Mock Test 2024 Electrical Machines DC Motor DC Motor Speed Control
A 200-V Dc generator supplies 4 kW at a terminal voltage of 200 V, the armature resistance being 0.5 Ω. If the machine is operated as a motor at the same terminal voltage with the same armature current, find the ratio of the generator speed Ng, to the motor speed Nm .
1
\(\dfrac{N_g}{N_m}=1.25\)
2
\(\dfrac{N_g}{N_m}=1.105\)
3
\(\dfrac{N_g}{N_m}=0.905\)
4
\(\dfrac{N_g}{N_m}=0.833\)