153213 A circular loop of radius $r$ of conducting wire connected with a voltage source of zero internal resistance produces a magnetic field $B$ at its centre. If instead, a circular loop radius $2 \mathbf{r}$, made of same material, having the same crosssection is connected to the same voltage source, what will be the magnetic field at its centre?
153213 A circular loop of radius $r$ of conducting wire connected with a voltage source of zero internal resistance produces a magnetic field $B$ at its centre. If instead, a circular loop radius $2 \mathbf{r}$, made of same material, having the same crosssection is connected to the same voltage source, what will be the magnetic field at its centre?
153213 A circular loop of radius $r$ of conducting wire connected with a voltage source of zero internal resistance produces a magnetic field $B$ at its centre. If instead, a circular loop radius $2 \mathbf{r}$, made of same material, having the same crosssection is connected to the same voltage source, what will be the magnetic field at its centre?
153213 A circular loop of radius $r$ of conducting wire connected with a voltage source of zero internal resistance produces a magnetic field $B$ at its centre. If instead, a circular loop radius $2 \mathbf{r}$, made of same material, having the same crosssection is connected to the same voltage source, what will be the magnetic field at its centre?