In DC machine, brushes are always placed along

Related MCQs

• Due to which of the following reasons, copper brushes in D.C. machine are used?
• The material used for commutator brushes is mostly
• In a DC motor the brushes shifted from the mechanical nuetral plane in a direction opposite to the rotation to _____.
• Excessive sparking at the brushes may be caused due to _____.
• A 220V DC series motor is taking a current of 40A. Resistance of armature is 0.5Ω and series field is 0.25Ω. What is the voltage at the brushes?
• A shunt motor runs at 500rpm on a 200V circuit. Its armature resistance is 0.5Ω and the current taken is 30A in addition to field current. What resistance must be placed in series with armature circuit to reduce to speed to 300 rpm; the current in armature remains same.
• When load is placed in three phase induction motor, its speed
• When load is placed in three phase induction motor its current
• When load is placed in three phase induction motor, its torque
• The output indicated on the name plate of any motor is always the: