A steady beam of alpha particles (q=+2e, mass m = 6.68 x 10-27 kg) traveling with constant kinetic energy 22 MeV carries a current of 0.26 μA. (a) If the beam is directed perpendicular to a flat surface, how many alpha particles strike the surface in 4.2 s? (b) At any instant, how many alpha particles are there in a given 27 cm length of the beam? (c) Through what potential difference in volts is it necessary to accelerate each alpha particle from rest to bring it to an energy of 22 MeV? (a) Number i (b) Number (c) Number i i Units Units Units

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Ohm's law

Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.

Path of Least Resistance

In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.