In Figure P31.100, (mathscr{E}_{1}=3.0 mathrm{~V}) and (mathscr{E}_{2}=5.0 mathrm{~V}). (a) What value of (mathscr{E}_{3}) causes the potential difference

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In Figure P31.100, \(\mathscr{E}_{1}=3.0 \mathrm{~V}\) and \(\mathscr{E}_{2}=5.0 \mathrm{~V}\).

(a) What value of \(\mathscr{E}_{3}\) causes the potential difference across resistor 1 to be zero?

(b) In that situation, what is the current through resistor 2 ?

Data from Figure P31.100

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