Two spherical conductors, A and B , are placed in vacuum. A has a radius rA=25cm and B of rB=35cm. The distance between the centers of the two spheres is d=225 cm.

A has a potential of VA =120 Volt and B has a potential of VB = -40 Volt.

a. An electron is released with zero speed from A . What will its speed be as it reaches B ? Express your answer in m/sec.

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b. A proton is released with zero speed from A . What will its speed be as it reaches B ? Express your answer in m/sec.

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c. We now change the potential of B to VB=+25 Volt. For this new configuration, What is the ratio of the speed of the electron (as it arrives at A ) and the speed of the proton (as it arrives at B )?

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