[单选题]
A DC motor of internal resistanqif5 *sd lj rb8m285rn4uyx:t):ls0,1np,iaxzll jpc grl76 ce 6.0 W is connected to a 24-V power supply. The operating current is 1.0 A at full speed. What is the backzxl1ajpl7nip,60, r)lslcg : $emf$ when the motor is running at full speed?