A charge feels a 7.89x 10^-7 N force when it moves 2090 m/s at a 29.4 angle to a 4.23x 10^-3 T magnetic field. What is the amount of the charge? Please help.

d

explanation:

v=uf/(u-f)

= 5.10/(5-10) convex lens has positive focal length

=50/-5

=-10 cm (formed at other side)

real, smaller and upside-down.   so the answer should be b.

current and voltage can both be different in different parts of a circuit so it matters where you place the ammeter and voltmete