Why is much less heat generated in long electric cables than in filaments of electric bulbs ?
Why is much less heat generated in long electric cables than in filaments of electric bulbs ?
Electric cables are made of thick copper wires which have a small resistance as compared to the resistance of the thin tungsten filament of electric bulbs.
Similar Questions
The unit of electric potential difference is $.....$
The unit of electric potential difference is $.....$
The quantity of charge flowing past a point multiplied by time is current.
The quantity of charge flowing past a point multiplied by time is current.
$(a)$ Name the effect of electric current which is utilised in the working of an electrical fuse.
$(b)$ How is a fuse connected in a domestic circuit ?
$(a)$ Name the effect of electric current which is utilised in the working of an electrical fuse.
$(b)$ How is a fuse connected in a domestic circuit ?
Two identical resistors, each of resistance $2 \Omega$, are connected in turn : $(i)$ in series, and $(ii)$ in paralle to a battery of $12 ,V$. Calculate the ratio of power consumed in the two cases.
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A conducting wire offers resistance to the flow of electrons because electrons repel each other in the wire.
A conducting wire offers resistance to the flow of electrons because electrons repel each other in the wire.