Following energized winding of a D.C. machine should not be opened as it would produce high inductive voltage which may be dangerous to personnel and may cause its own insulation failure.

Related MCQs

• If a cable of homogeneous insulation has a maximum stress of 10 kV/mm, then the dielectric strength of insulation should be
• A certain cable has an insulation of relative permittivity 4. If the insulation is replaced by one of relative permittivity 2, the capacitance of the cable will become
• Is a cable is to be designed for use on 1000 kV, which insulation would you prefer ?
• In a D.C. generator in case the resistance of the field winding is increased, then output voltage will
• In case of D.C. machine winding, number of commutator segments is equal to
• Which of the following insulation is used in cables ?
• Which of the following generating machine will offer constant voltage on all loads ?
• A sinusoidal voltage of 5 Hz is applied to the field of a shunt generator. The armature voltage wave
• The terminal voltage of a series generator is 150 V when the load current is 5 A. If the load current is increased to 10 A, the terminal voltage will be
• The open circuit voltage of a compound generator is 250 V. At full load the terminal voltage