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प्रश्न
Which is the better way to connect lights and other electrical appliances in domestic wiring: series circuits or parallel circuits? why?
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उत्तर
Parallel circuits – Because if one electrical appliance stops working due to some defect, then all other appliances in the circuit will keep working properly.
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संबंधित प्रश्न
The SI unit of charge is volt.
Three 2 V cells are connected in series and used as a battery in a circuit.
How many joules of electrical energy does 1 C gain on passing through (i) one cell (ii) all three cells?
Which unit could be used to measure current?
(a) Watt
(b) Coulomb
(c) Volt
(d) Ampere
Which type of circuit, series or parallel, is preferred while connecting a large number of bulbs:
(a) for decorating a hotel building from outside?
Name two devices which work on the heating effect of electric current.
Distinguish between an open and a closed circuit.
Define the following:
Semiconductors
Fig. shows a 3 pin plug with the cover removed. The electric cable
connected to the plug contains 3 wires with colour coded insulation namely brown, blue and green.
- Identify each of the colour coded wires by stating to which of the
terminals A, B or C in the diagram they should be connected. - Identify the terminal through which no current passes in normal
circumstances. - What is the purpose of the earthed wire connected to an electric
appliance like an electric heater? Describe how it works.
Name the principle on which a transformer works.
An electric bulb is rated 250 W, 230 V.
- the energy consumed in one hour, and
- the time in which the bulb will consume 1.0 kWh energy when connected to 230 V mains.
Fill in the blank :
1 mA = ............................. A.
State the condition when it is advantageous to connect cells in parallel.
In current electricity, a positive charge refers to ______.
- What is meant by electric current?
- Name and define its unit.
- Which instrument is used to measure the electric current? How should it be connected in a circuit?
Problems for practice:
If 5A current flows through a circuit, then convert the current in terms of microampere?
