The heat generated through $2 \,ohm$ and $8\, ohm$ resistances separately, when a condenser of $200\,\mu F$ capacity charged to $200\, V$ is discharged one by one, will be
A$4 \,J $ and $16\, J$ respectively
B$16 \,J $ and $ 4\, J$ respectively
C$4\, J$ and $8\, J$ respectively
D$4\, J$ and $4\, J$ respectively
Medium
Download our app for free and get started
D$4\, J$ and $4\, J$ respectively
d (d) Heat generated in both the cases will be same because the capacitor has the same energy initially
$ = \frac{1}{2}C{V^2} = \frac{1}{2} \times 200 \times {10^{ - 6}} \times {(200)^2} = 4\,J$
Download our app
and get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
The charge flowing through a resistance $R$ varies with time according to $Q = at -bt^2.$ The total heat produced in $R$ is : (assume that direction of current not reversed)
In a wire of circular cross-section with radius $r$, free electrons travel with a drift velocity $V$ when a current $I$ flows through the wire. What is the current in another wire of half the radius and of the same material when the drift velocity is $2V$
A charged particle having drift velocity of $7.5 \times 10^{-4}\, ms ^{-1}$ is an electric field of $3 \times 10^{-10}\, Vm ^{-1}$ has a mobility in $m ^{2} V ^{-1} s ^{-1}$ of
In a Wheatstone’s bridge all the four arms have equal resistance $R$. If the resistance of the galvanometer arm is also $R$, the equivalent resistance of the combination as seen by the battery is
In copper wire each atom releases one free electron. If diameter is $1\, mm$ and current is $1.1\,A$ find drift velocity. ($\rho = 9 \times 10^{+3}\, kg/m^3$ $M = 63\, gm/mole$)