Advertisements
Advertisements
प्रश्न
Why is parallel arrangement used in domestic wiring?
Advertisements
उत्तर
Parallel arrangement is used in domestic wiring because of the following reasons -
- Net resistance of the electric circuit decreases in parallel connection as compared to series connection due to which heat loss is reduced.
- Potential difference across each electrical device remains same i.e 220 V due to which all the electrical devices work upto their maximum potential.
- Each electrical device can be operated independently.
- If one electrical device stops working still other electrical devices continue to work properly.
APPEARS IN
संबंधित प्रश्न
An electric iron of resistance 20 ohms draws a current of 5 amperes. Calculate the heat produced in 30 seconds.
The current passing through a room heater has been halved. What will happen to the heat produced by it?
The electrical resistivities of four materials P, Q, R and S are given below:
| P | `6.84xx10^8`Ωm |
| Q | `1.70xx10^8`Ωm |
| R | ` 1.0xx10^15`Ωm |
| s | `11.0xx10^-7`Ωm |
Which material will you use for making: (a) heating element of electric iron (b) connecting wires of electric iron (c) covering of connecting wires? Give reason for your choice in each case.
Give a scientific reason:
For electric power transmission, copper or aluminium wire is used.
Identify the figure and give its use.
An electric iron of 1100 W is operated for 2 hrs daily. What will be the electrical consumption expenses for that in the month of April? (The electric company charges Rs 5 per unit of energy).
Answer the following question:
what is the heating effect of the electric current? state any four applications of it?
The ‘live’ and the ‘neutral’ wires have potential difference of _______.
These days when current in the circuit suddenly increases _______ switches are used.
What does overloading cause?
Name some devices that run using heat effect of electric current
Unscramble the following words:
SFEU
Paheli took a wire of length 10 cm. Boojho took a wire of 5 cm of the same material and thickness. Both of them connected the wires as shown in the circuit given in the following figure. The current flowing in both the circuits is the same.
- Will the heat produced in both cases be equal? Explain.
- Will the heat produced be the same if the wires taken by them are of equal lengths but of different thickness? Explain.
Explain the working of an electric fuse.
The electric fuse works on the Joule heating principle.
If 220 V potential difference is applied across an electric bulb, a current of 0.45 A flows in the bulb. What must be the power of the bulb?
Find the odd one out.
When a current I flows through a wire of resistance R for time t then the electrical energy produced is given by ______.
The graph of voltage vs current for four different materials is shown below.
Which of these four materials would be used for making filament of bulb?
An electric iron is rated 220 V, 2 kW. If the iron is used for 3h daily find the cost of running it for one week if it costs ₹ 4.25 per kWh.
