A steady current flows to the right along a long straight wire. An electron at s

Question

A steady current flows to the right along a long straight wire. An electron at some instant is moving away from the wire, at right angles to the wire in the plane of the page with a velocity v. In what direction will the electron be deflected by the magnetic force? (a) to the right (b) to the left (c) up out of the page (d) down into the page The loop has a capacitor attached as shown. If the magnetic flux in the loop points into the loop and is increasing in strength, determine the orientation of the electric field in the capacitor: a) A to B b) B to A c) Into the page d) Out of the page e) No electric field between A and B A doubly ionized atom has a kinetic energy of 60 ev is directed into with two transparent screens, one with an electric potential of A = 95 volts and the other with a potential of B = 120 volts, separated by 10cm. Which of the following is most likely to happen? a. The ion will positively accelerated through the gap, gaining kinetic energy. b. The ion will stop in-between the two plates. c. The ion will slow down, but make it all the way through between the two screens. d. The ion will begin to circulated (in a circle) between the two screens due to the electric field.

Explanation / Answer

17 magnetic field due to wire is coming out of the page(determine this by right hand rule hold wire and put thumb in the direction of current your ffingers curl give you the magnetic field direction) now for the electron use left hand (for positive charges we use right hand)move your fingers in the direction of the motion of electron that is downwards now turn your hand so that we can have the direction of the current by bending all fingers that direction is out of the page therefore your thumb will give you the magnetic force direction i.e right direction

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