A very thin $17\mathrm{.}0$ cm copper bar is aligned horizontally along the east$-$west direction.

If it moves horizontally from south to north at $15\mathrm{.}5\frac{m}{s}$ in a vertically upward magnetic field of $1\mathrm{.}24$ T $,$ what potential difference is induced across its ends $?$

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Part B

If it moves horizontally from south to north at $15\mathrm{.}5\frac{m}{s}$ in a vertically upward magnetic field of $1\mathrm{.}24$ T $,$ which end $($east or west$)$ is at a higher potential $?$

Enter your answer as "east" or "west".

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Part C

What would be the potential difference if the bar moved from east to west instead?