Two long, straight wires, one above the other, are seperated by a distance d = 1.53 cm and are parallel to the x−axisx−axis. Let the +y−axis+y−axis be in the plane of the wires in the direction from the lower wire to the upper wire. Each wire carries current 34 A in the +x−direction+x−direction. Find the magnetic force on a negative point charge 79 μCμC moving with velocity 3.49×105 m/s in the +y-direction, when the charge is:

a)  

b)  

Explanation:

Given that:

q = -79 μC

q = - 79×10⁻⁶ C

d = 1.53 cm

d = 0.0153 m

I = 34 A

v = 3.49×10⁵ m/s

The force on charge q is given by

a) At midway (A) , the B will be :

 and   will be equally the same in respect to their magnitude but opposite direction at point A.

So;

where

∴  

∴

b)

At a distance d/2 cm above the upper wire:

where:

  ; upward to the plane of paper

∴

B =

B =

B =

B = 2.074 × 10⁻³T  

∴

there is no correct list among the choices you've provided.

the list might look something like this:

-- baby human

-- piccolo

-- flute

-- soprano singer

-- trumpet

-- tenor singer

-- trombone

-- baritone singer

-- baritone horn

-- bass singer

-- tuba

since i had to make up the list myself, i made it easy on myself, and i didn't try to shuffle the string instruments and woodwinds into it too.

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force