10. A D.C series motor hoists a load at 4 m/sec while taking 30 A at 300 V from D.C mains. The total resistance of the motor is 0.3N. The external resistance to be added in the motor circuit to slow the hoisting speed from 4 m/s to 2 m/s. (assuming no magnetic saturation), is (a) 4.352 (c) 3.7450 (b) 3.5142 (d) 4.850
10. A D.C series motor hoists a load at 4 m/sec while taking 30 A at 300 V from D.C mains. The total resistance of the motor is 0.3N. The external resistance to be added in the motor circuit to slow the hoisting speed from 4 m/s to 2 m/s. (assuming no magnetic saturation), is (a) 4.352 (c) 3.7450 (b) 3.5142 (d) 4.850
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Transcribed Image Text:10. A D.C series motor hoists a load at 4 m/sec
while taking 30 A at 300 V from D.C mains.
The total resistance of the motor is 0.3N.
The external resistance to be added in the
motor circuit to slow the hoisting speed
from 4 m/s to 2 m/s. (assuming no magnetic
saturation), is
(a) 4.352
(c) 3.7452
(b) 3.5142
(d) 4.85
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