In a D.C. machine the number of brush arms is _____ the number of poles.

Related MCQs

• In a D.C. machine the current per brush arm should not be more than
• is usually used for brush rockers
• The weight of copper of both armature and field windings decreases with _____ in number of poles.
• The efficiency of a machine should be as ______ as possible to reduce the operating cost.
• The heated parts of an electrical machine dissipate heat into their surroundings by which of the following modes of heat dissipation ?
• The noise produced by a ______ cooled machine is less as the rotor moves in a medium of smaller density.
• The time taken by the machine to attain 0.632 of its final steady temperature rise is called
• The stator of a D.C. machine comprises of
• The laminations of the armature of a D.C. machine are usually _____ thick.
• In a D.C. machine, the value of peripheral speed should not, normally, exceed