The split-ring commutator connects the coil to the power supply and means that each time the coil rotates half a turn, the current in the coil reverses direction. … Some DC motors have a device called a commutator which switches the current direction so the motor keeps turning when DC is applied.
What reverses the direction of electric current in the armature coil of electric motor?
As the armature rotates, the commutator reverses the current in each coil as it moves between the field poles.
What reverses the direction of current in a DC motor?
Each half turn of the armature causes the brushes to contact a new split ring, reversing the direction of current flow through the armature windings, which reverses the polarity of the electromagnetism produced in the armature.
Which component in DC motor reverses flow of current in a coil?
Answer. Answer: So the commutator reverses the current inevery half turn producing a steady torque and thearmature coil rotates in a single direction.
What is the part of a DC motor that reverses the direction of current through the coil every half cycle?
Answer. Explanation: The split-ring commutator reverses the current in the coil as it rotates.
What is the direction of rotation of armature coil in electric motor?
1) When electric current is passed into the rectangular coil, this current produces a magnetic field around the coil. … Whereas the force on the side CD of the coil is in the upward direction. ABCD rotate in anti-clockwise direction.
What will happen if the direction of current is changed in the coil of motor?
When electric current is supplied to the coil of electric motor, it gets deflected because of magnetic field. … Reversal of direction of current reverses the direction of forces acting on the coil. The change in direction of force pushes the coil; and it moves another half turn.
How can the direction of DC motor be changed?
We can change the direction of DC motor 1) by changing the polarity of applied field voltage. 2) by changing the polarity of the applied voltage to the armature winding. 3) if we change both of the polarity of field and armature then the motor will rotate with previous direction…
What is the direction of current in motor?
Hint: For AC motors, the current flowing through the electromagnet and the current flowing through the coil both reverse, exactly in step, so the force on the coil is always in the same direction and the motor always spins either clockwise or counter-clockwise.
Which part of motor is responsible for reversing the direction of current?
1 Answer. A commutator reverses the direction of current in the coil of a motor.
Does the commutator rotate?
A commutator consists of a set of contact bars fixed to the rotating shaft of a machine, and connected to the armature windings. As the shaft rotates, the commutator reverses the flow of current in a winding.
What helps to change the direction of current through the coil after every half rotation in motor?
Answer : The split ring reverses the direction of current in the armature coil after every half rotation due to change in orientation of the magnetic field, i.e, it acts as a commutator.
What part of a DC motor causes the polarity of the coil to switch?
As the brushes pass over the gaps in the commutator, the supplied electrical charge switches commutator segments, which switches the electrical polarity of the armature coils. This switching of the polarity in the coils maintains the armature’s rotation in one direction.
Which of the following rule is used to determine the direction of rotation of DC motor?
Which of the following rule is used to determine the direction of rotation of D.C motor? Answer 4. Fleming’s left-hand rule.