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प्रश्न
Point out two main disadvantages of ‘Tree System’.
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उत्तर
The three main disadvantages are:
(i) Longer length of wire is required for wiring different rooms in a house. Since all circuits start from the main distribution board and so it is comparatively more Expensive.
(ii) If fuse blows off in any part of the building, it disconnects all the appliances in the circuit.
संबंधित प्रश्न
How much energy does a 100 W electric bulb transfer in 1 minute?
(a) 100 J
(b) 600 J
(c) 3600 J
(d) 6000 J
Name two gases which are filled in filament type electric light bulbs.
State and define the household unit of electricity.
List the names of three electrical gadgets used in your house. Write their power, voltage rating and approximate time for which each one is used in a day. Hence, find the electrical energy consumed by each in a day.
A current of 2 A is passed through a coil of resistance 75Ω for 2 minutes. (a) How much heat energy is produced? (b) How much charge is passed through the resistance?
What is the current I in the given circuit (Fig. )?
Two resistors A and B of 4 Ω and 6 Ω, respectively are connected in parallel. The combination is connected across a 6 volt battery of negligible resistance. Calculate the power dissipated in each resistor.
Why is the heating element of an electric oven wound on a helix? State the reason.
An electric iron is rated at 230 V, 750 W. What is its resistance? What maximum current can be passed through it?
An electric bulb is rated as 100W – 250V. What information does it convey? Calculate the current through the filament of the bulb.
