Plz answer 4,5,8&9:


4. Two bulbs have rating 100 W, 200  and 60 W, 220 V. Which one has a greater resistance ?
5. Why is tungsten not used as a fuse wire ?
8. Current is a scalar quantity but still a direction is associated with it. Comment on this statment. 

 

Dear Student,

4.
We know the relation,


5. Tungsten is not used as fuse wire because it has a high melting point and if we use it the defiantly the fuse will not work and in case of high voltage the bulbs and appliances will get fused.

8.

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