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The direction of rotation of a d.c. series motor can be changed by
- a)by interchanging supply terminals
- b)either by interchanging supply terminals or by interchanging field terminals
- c)by interchanging the field terminals
- d)by interchanging supply terminals as well as field terminals
Correct answer is option 'C'. Can you explain this answer?
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The direction of rotation of a d.c. series motor can be changed bya)by...
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Explanation:
Interchanging Field Terminals:
When the field terminals of a d.c. series motor are interchanged, the direction of the magnetic field produced by the field winding is reversed. This change in the magnetic field direction affects the interaction between the armature current and the magnetic field, causing the motor to rotate in the opposite direction.
Interchanging Supply Terminals:
When the supply terminals of a d.c. series motor are interchanged, the direction of the current flowing through the armature winding is reversed. This reversal of current direction changes the interaction between the armature current and the magnetic field, leading to a change in the direction of rotation of the motor.
Effect of Interchanging Field Terminals vs. Supply Terminals:
While both interchanging the field terminals and interchanging the supply terminals can change the direction of rotation of a d.c. series motor, interchanging the field terminals is the preferred method. This is because interchanging the field terminals is a simpler and more straightforward process compared to interchanging the supply terminals. Additionally, interchanging the field terminals does not involve dealing with potential safety hazards associated with the supply terminals.
Therefore, the correct option is 'C' - by interchanging the field terminals.
Interchanging Field Terminals:
When the field terminals of a d.c. series motor are interchanged, the direction of the magnetic field produced by the field winding is reversed. This change in the magnetic field direction affects the interaction between the armature current and the magnetic field, causing the motor to rotate in the opposite direction.
Interchanging Supply Terminals:
When the supply terminals of a d.c. series motor are interchanged, the direction of the current flowing through the armature winding is reversed. This reversal of current direction changes the interaction between the armature current and the magnetic field, leading to a change in the direction of rotation of the motor.
Effect of Interchanging Field Terminals vs. Supply Terminals:
While both interchanging the field terminals and interchanging the supply terminals can change the direction of rotation of a d.c. series motor, interchanging the field terminals is the preferred method. This is because interchanging the field terminals is a simpler and more straightforward process compared to interchanging the supply terminals. Additionally, interchanging the field terminals does not involve dealing with potential safety hazards associated with the supply terminals.
Therefore, the correct option is 'C' - by interchanging the field terminals.
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The direction of rotation of a d.c. series motor can be changed bya)by interchanging supply terminalsb)either by interchanging supply terminals or by interchanging field terminalsc)by interchanging the field terminalsd)by interchanging supply terminals as well as field terminalsCorrect answer is option 'C'. Can you explain this answer?
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