Question
A watch uses energy at the rate of $210 \mu \mathrm{W}$. What current does it draw from its $1.5-\mathrm{V}$ battery?
Step 1
The rate of energy used by the watch is given as $P = 210 \mu W = 2.1 \times 10^{-4} W$. The potential difference is given as $V = 1.5 V$. Show more…
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