Advertisements
Advertisements
प्रश्न
What are the two main systems of wiring commonly used in houses? Which of these systems mentioned by you is better and why?
Advertisements
उत्तर
The two main systems of wiring are:
(i) the tree system, and
(ii) the ring system.
Out of these systems, the ring system is better. The reason is that this system of wiring is cheaper because a low rating wire can be used for connection of appliances.
संबंधित प्रश्न
An electric bulb is rated 220 V and 100 W. When it is operated on 110 V, the power consumed will be ______.
Name two safety devices which are connected to the live wire of a household electric circuit
State and define the household unit of electricity.
What is the resistance, under normal working conditions of a 240 V electric lamp rated at 60 W? If two such lamps are connected in series across a 240 V mains supply, explain why each one appears less bright.
The coil of an electric bulb takes 40 watts to start glowing. If more than 40 W are supplied, 60% of the extra power is converted into light and the remaining into heat. The bulb consumes 100 W at 220 V. Find the percentage drop in the light intensity at a point if the supply voltage changes from 220 V to 200 V.
An electric bulb is marked 100 W, 230 V. What does this mean?
At what voltage is the electric power generated at the generating station? Explain the transmission of this power to your house.
A battery of e.m.f. 12V and internal resistance 1.6 Ω is connected to two resistors of 4Ω and 6Ω connected in parallel. Calculate:
(i) the current drawn from the battery,
(ii) the power dissipated in each resistor,
(ii)the total power supplied by the battery.
A fuse is rated 5 A. Can it be used with a geyser rated 1540 W, 220 V Write Yes or No. Give supporting calculations to justify your answer.
