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The largest v...

Question

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

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Solution

$i l B = m g$
$\frac{V}{R} l B = m g$
$V = \frac{m g R}{l B}$ $= \frac{(0.75) (9.8) (25)}{0.5 \times 0.45} = 8.17 V$

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