Question

slve the question no. 8

Answer 1

a)-because it helps the bulb not to burst or gets damaged
b)-because they are the good conductors of the electricity.
c)-it's because to protect he device from any type of major shock and it is connected in series so that to resist max . current!!

Answer 2

(A)Filling a bulb with an inert gas such as argon or nitrogen slows down the evaporation of the tungsten filament compared to operating it in a vacuum. This allows for greater temperatures and therefore greater efficacy with less reduction in filament life.
(B)Copper and aluminium wires are generally used for electricity transmission as they have low resistivity. Low resistivity decreases the resistance and hence increases the amount of current in the circuit. Therefore, they are good conductors ofelectricity
(c)A fuse is nothing more than a short length of wire designed to melt and separate in the event of excessive current. Fuses are always connected in series with the component(s) to be protected from overcurrent, so that when the fuse blows (opens) it will open the entire circuit and stop current through the component(s).