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


Next: There are two types of seismic waves produced by earthquakes. They are called P-waves and S-waves. P-waves are longitudinal and S-waves are transverse.(a) Explain...
Previous: Describe the digestion of ugali and meat

View More Physics Questions and Answers | Return to Questions Index


Exams With Marking Schemes

Related Questions