Answer
58.8k+ views
Hint: Split rings are also known as commutators. They are used in DC electric motors to maintain a steady current to the windings which should produce a constant torque since the current direction in a coil is reversed after each half turn.
Complete Step by step solution: Commutators or split rings are metal connections with insulator sheets (of a non-conducting, non-reacting material especially mica) in between for providing a steady direction of current flow. In a power generator, the circuit which moves in the magnetic field produces AC power, since the direction of motion of an arm of the coil changes with respect to the magnetic field after every half cycle. Thus the power output we get is AC power and it can be extracted through slip rings.
However, when needing DC current we would have to change the direction of motion of the coil rotating in the magnetic field after every half cycle. This is not possible as then the motion of a coil in the magnetic field would become oscillatory. This would cause immense mechanical stress every time the motion of the coil is being changed.
Thus instead of changing the motion of the coil, we change the connections after every half-cycle or every \[\pi \,radians\]of angle rotated. This can be done electronically now but earlier split rings were used.
Split rings can be imagined as two-half slip rings with an insulator in between so that the current-carrying conductor which is connected to the coil rotating in the magnetic field, resets its connections after every half cycle of rotation. Thus it gives the output as pure DC, although it is sinusoidal DC current and not a constant voltage. To generate constant DC, many coils of different phases are used in the DC generator.
Therefore the correct option is $(B)$.
Note: Split rings should not be confused with slip rings which are used in AC generators to produce an alternating voltage. Slip rings are used to transfer electrical power from a rotating body to a static body and so were used in commercial power generators.
Complete Step by step solution: Commutators or split rings are metal connections with insulator sheets (of a non-conducting, non-reacting material especially mica) in between for providing a steady direction of current flow. In a power generator, the circuit which moves in the magnetic field produces AC power, since the direction of motion of an arm of the coil changes with respect to the magnetic field after every half cycle. Thus the power output we get is AC power and it can be extracted through slip rings.
However, when needing DC current we would have to change the direction of motion of the coil rotating in the magnetic field after every half cycle. This is not possible as then the motion of a coil in the magnetic field would become oscillatory. This would cause immense mechanical stress every time the motion of the coil is being changed.
Thus instead of changing the motion of the coil, we change the connections after every half-cycle or every \[\pi \,radians\]of angle rotated. This can be done electronically now but earlier split rings were used.
Split rings can be imagined as two-half slip rings with an insulator in between so that the current-carrying conductor which is connected to the coil rotating in the magnetic field, resets its connections after every half cycle of rotation. Thus it gives the output as pure DC, although it is sinusoidal DC current and not a constant voltage. To generate constant DC, many coils of different phases are used in the DC generator.
Therefore the correct option is $(B)$.
Note: Split rings should not be confused with slip rings which are used in AC generators to produce an alternating voltage. Slip rings are used to transfer electrical power from a rotating body to a static body and so were used in commercial power generators.
Recently Updated Pages
Write a composition in approximately 450 500 words class 10 english JEE_Main
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Arrange the sentences P Q R between S1 and S5 such class 10 english JEE_Main
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
What is the common property of the oxides CONO and class 10 chemistry JEE_Main
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
What happens when dilute hydrochloric acid is added class 10 chemistry JEE_Main
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
If four points A63B 35C4 2 and Dx3x are given in such class 10 maths JEE_Main
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
The area of square inscribed in a circle of diameter class 10 maths JEE_Main
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Other Pages
What is the pH of 001 M solution of HCl a 1 b 10 c class 11 chemistry JEE_Main
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
The resultant of vec A and vec B is perpendicular to class 11 physics JEE_Main
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
A train starts from rest from a station with acceleration class 11 physics JEE_Main
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
If a wire of resistance R is stretched to double of class 12 physics JEE_Main
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Electric field due to uniformly charged sphere class 12 physics JEE_Main
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
The maximum resultant of the 2 vectors is 26 units class 11 physics JEE_Main
![arrow-right](/cdn/images/seo-templates/arrow-right.png)