(a) What is the magnitude of an electron’s acceleration in a uniform electric field of magnitude ? (b) How long would the electron take, starting from rest, to attain one-tenth the speed of light? (c) How far would it travel in that time?
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An electron with a speed of 5x108 cm/s enters an electric field of magnitude 1.00 × 10³ N/C, travelling along a field line in the direction that retards its motion. (a) How far will the electron travel in the field before stopping momentarily, and (b) how much time will have elapsed? (c) If the region containing the electric field is 8.00 mm long (too short for the electron to stop within it), what fraction of the electron’s initial kinetic energy will be lost in that region?
A proton accelerates from rest in a uniform electric field of 640 N/C. At some later time, its speed is 1.2 x 106 m/s.
(a) What is the magnitude of the acceleration of the proton?
(b) How long does it take the proton to reach this speed?
(c) How far has it moved in that interval?
(d) What is its kinetic energy at a later time?
A proton accelerates from rest in a uniform electric field of 610N/C. At some later time, its speed is 1.4 106 m/s.(a) Find the magnitude of the acceleration of the proton.m/s2(b) How long does it take the proton to reach this speed?µs(c) How far has it moved in that interval?m(d) What is its kinetic energy at the later time?J
