हिंदी

What is the Energy Conversion When an Electric Current Passes Through a Metallic Wire? - Physics

Advertisements
Advertisements

प्रश्न

What is the energy conversion when an electric current passes through a metallic wire?

एक पंक्ति में उत्तर
Advertisements

उत्तर

When an electric current passes through a metallic wire, the wire becomes hot and the whole of electric energy is converted into heat energy.

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

संबंधित प्रश्न

1 kWh = ________ J


An electric kettle for use on a 230 V supply is rated 3000 W. For safe working, the cable connected to it should be able to carry at least: 

(a) 2 A
(b) 5 A
(c) 10 A
(d) 15 A


Mention three uses of the carbon arc.


In an electric radiator or room heater, state with reason, why the porcelain tube wound with a nichrome wire is placed between the pole and principal focus of the parabolic concave reflector.


Why is a concave reflector placed behind the heating element in a room heater.


An electric bulb is rated as 100W – 250V. What information does it convey? Calculate the resistance of its filament while glowing.


A bulb is marked 100W, 220V and an electric heater is marked 2000 W, 220 V.
(i) What is the ratio between the resistances of these two devices?
(ii) How does the power-voltage rating of a device help us to decide about the type of leads (connecting wires) to be used for it?
(iii) In which of the above two devices, a thicker connecting wire of lead is required?


A house is provided with 15 bulbs of 40W, 5 bulbs of 100W, 5 fans of 80 W, and one heater of 1.0 kW. Each day bulbs are used for 4h, fans for lOh, and heater for 2h. The voltage of mains is 220 V. Calculate:
(i) Maximum power of the circuit in the house,
(ii) maximum current capacity of the main fuse in the house,
(iii) the electrical energy consumed in a week,
(iv) cost of electricity consumed at 1.25 Rs. per kWh.


An electrical appliance is rated 1500 W, 250 V. This appliance is connected to 250 V mains. Calculate:
(i) the current drawn,
(ii) the electrical energy consumed in 60 hours,
(iii) the cost of electrical energy consumed at Rs. 2.50 per kWh.


A electric bulb is rate 220 V, 60 W. its electric cell resistance is nearly


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×