Why should a DC series motor NEVER be started under no-load conditions?
AIt will attain dangerously high speed
BIt will fail to start
CIt will reverse its direction of rotation
DIt will burn out due to low current
Explanation
At no load, flux Phi is very small because field current is tiny; since N is inversely proportional to flux, the motor reaches dangerously high speeds that can ruin the motor.
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