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प्रश्न
What is the function of the split rings in a d.c. motor?
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उत्तर
The split ring atts as a commutator in a d.c. motor. With the split ring, the direction of current through the coil is reversed after every half rotation of coil and thus the direction of couple rotating the coil remains unchanged and the coil continues to rotate in the same direction.
संबंधित प्रश्न
Define Electric power.
Which particles are responsible for current in conductors?
The unit for expressing electric power is:
(a) volt
(b) joule
(c) coulomb
(d) watt
The SI unit of energy is :
(a) joule
(b) coulomb
(c) watt
(d) ohm-metre
Calculate the current through a 60 W lamp rated for 250 V. If the line voltage falls to 200 V, how is the power consumed by the bulb affected?
Which material is the calorimeter commonly made of? Give one reason for using this material.
What do you understand by ‘earthing’? What are the advantages of earthing in a household electric circuit? Explain, how it is done?
An Electric bulb is marked 100 W, 230 V. What find the energy consumed by the bulb in one hour.
An Electric bulb is marked 100 W, 230 V. What current does it take?
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