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An electric bulb is rated ‘240V,100W .It contains a 1m long coiled tungsten wire . When switched on the wire reaches a temperature of...

      

An electric bulb is rated ‘240V,100W .It contains a 1m long coiled tungsten wire . When switched on the wire reaches a temperature of about 2500 degrees Celsius.
(i) How much energy is given out by the bulb in 1second

(ii) Why is the wire coiled?

(iii) State two properties of tungsten which make it suitable for use in electric bulbs.

  

Answers


joseph
(i)E=100J
(ii) To make it fit into the bulb
(iii) –high melting point
-high resistance
joseph rimiru answered the question on January 2, 2018 at 19:56


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