The pointer of an indicating instrument should be
The pointer of an indicating instrument should be
The heated parts of an electrical machine dissipate heat into their surroundings
The heated parts of an electrical machine dissipate heat into their surroundings by which of the followingmodes of heat dissipation ?
Electrical machines having a power output up to about 750 W may be called_______
Electrical machines having a power output up to about 750 W may be called_______machines.
The action of electromagnetic machines can be related to which of the following
The action of electromagnetic machines can be related to which of the following basic principles ?
The heat dissipated by from a surface depends upon its temperature and its chara
The heat dissipated by from a surface depends upon its temperature and its characteristics like colour, roughness etc.
In transformers using hot rolled steel, the cross-section of the yoke is made ab
In transformers using hot rolled steel, the cross-section of the yoke is made about _____ greater than that of the core
The slot leakage can be calculated by making which of the following assumptions
The slot leakage can be calculated by making which of the following assumptions ?
An induction meter can handle current up to
An induction meter can handle current up to
The stator of a D.C. machine comprises of
The stator of a D.C. machine comprises of
_______ is extensively used for those portions of magnetic circuit which carry s
_______ is extensively used for those portions of magnetic circuit which carry steady flux and need superior mechanical properties ?
Electrical machines having power outputs ranging from a few kW up to approximate
Electrical machines having power outputs ranging from a few kW up to approximately 250 kW may be classified as
In a vibrating reed frequency meter the natural frequencies of two adjacent reed
In a vibrating reed frequency meter the natural frequencies of two adjacent reeds have a difference of