Question

The largest voltage the battery can have without breaking the circuit at the supports is $8.175\times {10}^{x}V.$ Find x.

Answer 1

$ilB=mg$

$\frac{V}{R}lB=mg$

$V=\frac{mgR}{lB}$$=\frac{\left(0.75\right)\left(9.8\right)\left(25\right)}{0.5\times 0.45}=8.17V$