单项选择题
Line losses in a distribution circuit are kept to a minimum by （）.
A.adding rubber insulation conductors to the circuit
B.using higher current and lower voltage increasing the
C.number of thermal relays in the circuit
D.using higher voltage and lower current
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相关考题
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单项选择题
Which of the following components are used to convert alternating current produced in the generator windings to direct current?（）
A.Armature and equalizer
B.Commutator and brushes
C.Rotor and interpoles
D.Field and exciter -
单项选择题
In a series circuit, which value will remain unchanged at all places in the circuit?（）
A.Voltage
B.Current
C.Resistance
D.Inductance -
单项选择题
Most conducting materials such as copper, aluminum, iron, nickel, and tungsten （）.
A.increase in resistance with increased temperature
B.increase in resistance with decreased temperature
C.decrease in resistance with increased temperature
D.increase in conductance with increased temperature
