हिंदी

Name Two Common Material Used for Heating Elements.

Advertisements
Advertisements

प्रश्न

Name two common material used for heating elements.

टिप्पणी लिखिए
Advertisements

उत्तर

Nichrome and manganin are the common alloys that are mostly used for making heating elements.
Nichrome is: 60% nickel + 25% iron + 15% chromium.
Manganin is: 83% manganese + 13% copper + 4% nickel.

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

संबंधित प्रश्न

Explain why, filament type electric bulbs are not power efficient.


An electrical appliance having a resistance of 200Ω is operated at 200 V. Calculate the energy consumed by the appliance in 5 minutes (i) in joules (ii) in kWh.


Water in an electric kettle connected to a 220 V supply took 5 minutes to reach its boiling point. How long would it have taken if the supply voltage had fallen to 200 V?


A servo voltage stabiliser restricts the voltage output to 220 V ± 1%. If an electric bulb rated at 220 V, 100 W is connected to it, what will be the minimum and maximum power consumed by it?


A potential difference of 6 V is applied across a 3 Ω resistor. What is the current flowinq throuqh the circuit?


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

The diagram shows a coil connected to a center zero galvanometerG . The galvanometer shows a deflect ion to the right when the north pole N of a powerful magnet is moved to the right as shown .

(i) Explain, why the defelct ion occurs in the galvanometer.
(ii ) State whether th e current in the coil is cl ockwise or anticl ockwise
when viewed from the end P.
(iii ) State th e observation in G when the coil is moved away from north
pole N of the magnet keeping the magnet stationary.
(iv)State the observation in G when both the coil and the magnet are
moved to right at th e same speed .


Why is the heating element of an electric oven wound on a helix? State the reason.


What would happen and why, to an electric bulb when it is connected across a supply of voltage (i) lower (ii) higher than its proper rating?


Two bulbs are rated: bulb A 100W, 120 V bulb B 10W, 120 V. If both are connected across a 120V supply, which bulb will consume more energy, When in series? Also calculate the current through each bulb in above cases.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×