1. where is the magnetic field most nearly uniform?
2.as shown in the diagram, a proton is traveling at speed v as it enters a uniform magnetic field of strength b. the initial direction of the proton is toward the right of the screen. the field deflects the proton
3.as shown in the diagram, an electron is traveling at speed v as it enters a uniform magnetic field of strength b . the initial direction of the electron is toward the right of the screen. what are the magnitude and direction of the force .
my answer for #2 is a , and #3 is a.

One

A wire carrying a current creates a circular field. Not A.

B is pretty uniform. I would pick it.

C The lines bend around the north and south poles. Not C

D Same Remark as C.

Two

The force exerted by the magnetic field is the palm of your right hand.Your thumb is the direction of the charged streamThe fingers are the direction of B which I take to be into the page.

If all these are in agreement with what you think you have been given then A is the correct answer. The proton will be defected in the direction of the palm.

Three

As stated in One the fingers point in the direction of B, The thumb is the direction of the charge and the palm is the direction of the force when the item is a plus charge. When the travelling charge is minus as this one is, use the back of your hand. In that case, The electron will be deflected downward. This assumes the Magnetic field is pointing into the page.

The answer is A.

Try c ? that’s what i got

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.