Question

Can someone please help me with D and E.
Constants Part A To understand the magnetic force on a straight current-carrying wire in a uniform magnetic field. Magnetic fields exert forces on moving charged particles, whether those charges are moving independently or are confined to a current- carrying wire. The magnetic force Fon an individual moving charged particle depends on its velocity and charge er. In the case of a current-carrying wire, many charged particles are simultaneously in motion, so the magnetic force depends on the total current I and the length of the wire L. Consider a wire of length L = 0.30 m that runs north-south on a horizontal surface. There is a current of I = 0.50 A flowing north in the wire. The rest of the circuit, which actually delivers this current, is not shown.) The Earth's magnetic field at this location has a magnitude of 0.50 gauss (or, in Sl units, 0.5 x 10- tesla) and points north and 38 degrees down from the horizontal, toward the ground. What is the size of the magnetic force on the wire due to the Earth's magnetic field? In considering the agreement of units, recall that 1 T=1N A -m).(Figure 1) Express your answer in newtons to two significant figures. View Available Hint(s) The size of the magnetic force on a straight wire of length L carrying current I in a uniform magnetic field with strength Bis F=ILB sin(). 4.6x10-6 N Submit Previous Answers Here is the angle between the direction of the current (along the wire) and the direction of the magnetic field. Hence B sin() refers to the component of the magnetic field that is perpendicular to the wire B. Thus this equation can also be written as FEILE. The direction of the magnetic force on the wire can be described using a night-hand rule." This will be discussed after Part B. Correct Because the Earth's magnetic field is quite modest, this force is so small that it might be hard to detect. Figure TK 1 of 2 > Part B Now assume that a strong, uniform magnetic field of size 0.55 T pointing straight down is applied. What is the size of the magnetic force on the wire due to this applied magnetic field? Ignore the effect of the Earth's magnetic fieki. Express your answer in newtons to two significant figures. Vlew Available Hint(s) 8.3x10-2 N Suomi S Previous Answers powa Correct This force would be noticeable if the wire were of light weight.

Answer 1

Part D

Here, use right hand rule.

Point the index finger in the direction of current, middle finger in the direction of field then thumb will point to the magnetic force.

possible answers are

1) Current in the wire flows straight down; the magnetic field points due west.

2) Current in the wire flows straight up; the magnetic field points due east.

3) Current in the wire flows due east; the magnetic field points straight down.

4) Current in the wire flows due west and slightly up; the magnetic field points due east.

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Part E

Here,

angle between current and and field is zero,

so,

F = 0