Question

In a typical parallel plate capacitor the separation distance between the plates is "d". For a charged capacitor, if you increase only the separation distance of the plates the following occurs: The potential (V) between the plates remains constant but the electric field increases, The potential (V) between the plates increases but the electric field remains constant. The potential (V) between the plates remains constant and the electric remains constant. The potential (V) between the plates remains constant but the electric field decreases. The potential (V) between the plates decreases but the electric field increases. Two parallel current carrying conductors experience a mutual magnetic attraction arising from their respective currents. What is the relative orientation of the currents in the two conductors? parallel anti-parallel one conductor has zero current sideways none of these An electron enters a region of space where a uniform magnetic field oriented perpendicular to the electron's path is present. As a result the electron begins to turn in a circular arc of radius R. A proton traveling along the same path with the same speed and entering the same region, would, turn in the same direction with the same radius. turn in the opposite direction with the same radius. turn in the same direction with a larger radius. turn in the opposite direction with a larger radius. turn in the opposite direction with a smaller radius. turn in the same direction with a smaller radius. none of the above. A charged particle moves in the plane of a uniform magnetic field at an angle of 30 degree to the magnetic field lines. Its motion can best be described as, circular linear elliptical parabolic helical You wish to construct a rail gun to shoot a projectile in the i direction. If the current in the projectile is in the -k direction what must be the direction of B? i k j -j -k

I mostly just need to confirm my answers thanks!

Answer 1

2.1 For a parallel plate capacitor, C = Ae/d and Q = CV
so, when d is increased, C decreases
and Q is constasnt
so, V increases
so, b) V increasesm but E = V/d = constant
2.2 wo wires carrying current in same direction always attract each other. SO the current is a) parallel
2.3 The proton will have the force acting on the opposite direction, due to opposite charge
also, F = qVB
and F = mv^2/r
so mv/r = qB
r = mv/qB
so mass of proton is more, so more radius
hence
d) the proton turns in opposite irection with larger radius
2.4 The component of the velocity parallel to field remains constant, the component perpendicular to the fiedld causes a force ont he particvel causing it to move in circular direction
hence the net motion is a helix