Variation of speed with load

Low power factor

Tendency to produce sparking at the brushes

All the above

three times

the same as

1.5 times

one-third

induction motor

synchronous motor

universal motor

none of the above

higher speed with D.C. supply and with less sparking

higher speed with A.C. supply and with less sparking

same speed with both A.C. and D.C. supplies

higher speed with A.C. supply but with increased sparking at the brushes

conductivity

inductively

conductively as well as inductively

any of the above