Heat produced in a wire of resistance $R$ due to current flowing at constant potential difference is proportional to
A$\frac{1}{{{R^2}}}$
B$\frac{1}{R}$
C$R$
D${R^2}$
Easy
Download our app for free and get started
B$\frac{1}{R}$
b (b) At constant p.d., heat produced $ = \frac{{{V^2}}}{R}\,i.e.\,H \propto \frac{1}{R}$
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.*
Voltmeters $V_1$ and $V_2$ are connected in series across a $D.C.$ line. $V_1$ reads $80\, volts$ and has a per volt resistance of $200 \,\Omega$. $V_2$ has a total resistance of $32 \,kilo-ohms$. The line voltage is .............
A parallel combination of two resistors, of $1 \,\Omega$ each, is connected in series with a $1.5 \,\Omega$ resistor. The total combination is connected across a $10\, V$ battery. The current flowing in the circuit is .............. $A$