Advertisements
Advertisements
प्रश्न
What is the function of the split rings in a d.c. motor?
Advertisements
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.
Calculate the cost of operating a heater of 500 W for 20 hours at the rate of Rs 3.90 per unit.
At a given time, a house is supplied with 100 A at 220 V. How many 75 W, 220 V light bulb could be switched on in the house at the same time (if they are all connected in parallel)?
Two bulbs are rated 60 W, 220 V and 60 W, 110 V respectively. Calculate the ratio of their
resistances
Name two common material used for heating elements.
Why is heating element wound on a long porcelain rod in a room heater.
Name a metal that is used as an electron emitter. Give one reason for using this metal.
Find the energy released by a current of 0.25 amperes flowing through a heater for 5 minutes. The p.d. is 230 V.
1 mV is equal to:
