हिंदी

An Electric Bulb is Marked 100 W, 230 V. What Find the Energy Consumed by the Bulb in One Hour.

Advertisements
Advertisements

प्रश्न

An Electric bulb is marked 100 W, 230 V. What find the energy consumed by the bulb in one hour.

एक पंक्ति में उत्तर
Advertisements

उत्तर

Energy consumed in Is is 100 J.
∴ Energy consumed in hour = 100 × 60 × 60J = 360000 J.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?

संबंधित प्रश्न

Define watt-hour. How many joules are equal to 1 watt-hour?


Name the S.I unit of electrical energy. How is it related to Wh?


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?


Calculate the current through a 60 W lamp rated for 250 V. If the line voltage falls to 200 V, how is the power consumed by the bulb affected?


A coil of copper wire is connected to a galvanometer. What would happen if a bar magnet is:
(i) Pushed into the coil with its north pole entering first?
(ii) Held at rest inside the coil?
(iii) Pulled out again?


What is the usual colour code followed for connecting live, neutral and earth wires?

Why is heating element wound on a long porcelain rod in a room heater.


The resistance of filament of an electric heater is 500 Ω It is operated at 200V for 1 hour daily. Calculate the current drawn by the heater and the energy consumed in joule.


A room has AC run for 5 hours a day at a voltage of 220V. The wiring of the room consists of Cu of 1 mm radius and a length of 10 m. Power consumption per day is 10 commercial units. What fraction of it goes in the joule heating in wires? What would happen if the wiring is made of aluminium of the same dimensions?

`[ρ_(Cu) = 1.7 xx 10_(Ωm)^-8, ρ_(Al) = 2.7 xx 10^-8 Ωm]`


Two heaters A and B have power rating of 1 kW and 2 kW, respectively. Those two are first connected in series and then in parallel to a fixed power source. The ratio of power outputs for these two cases is ______


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×