On which factors does the resistlvity of conducting wire depend?
How will you conclude that the same potential difference (voltage) exists across three resistors connected in a parallel arrangement to a battery?
The filament of electric bulb is made of tungsten Why ?
An electric iron has a rating of $750\, W ; 200\, V$. Calculate
$(i)$ the current required.
$(ii)$ the resistance of its heating element.
$(iii)$ energy consumed by the iron in $2$ hours.
$(a)$ What are the values of $mA$ and $\mu A$ ?
$(b)$ Draw the symbols of battery and rheostat.