750 to 1000 ohms

500 to 750 ohms

10 to 50 ohms

0.1 to 1 ohm

1/2 of the original length

1/3 of the original length

3/4 of the original length

2/3 of the original length

It will run as a D.C. generator

It will run in the reverse direction

It will run in the same direction

It will burn out

The motor speed will be reduced drastically

The torque of the motor will be increased

The motor speed could become dangerously high

Field current will become zero and hence motor stops

2 point

3 point

4 point

Drum type