A dc series motor is running at rated speed. If a resistance is placed in series, the speed of the motor

A dc series motor is running with a diverter connected across its field winding. If the diverter resistance is increased, then the speed of the motor

Left hand rule is applicable to

Which of the following motors has high starting torque?

If field of d.c. shunt motor is opened, then

Voltage applied across the shunt motor has to

Maximum number of brushes which can be used in a machine is

All machines have the structure such that

All rotating machines are basically