Force on an electron from a magnetic field

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Homework Help Overview

The discussion revolves around a problem involving the electrostatic force on a charged block placed in an electric field. The original poster is attempting to determine the angle of the force vector relative to the positive x-axis.

Discussion Character

  • Conceptual clarification, Mathematical reasoning, Problem interpretation

Approaches and Questions Raised

  • The original poster calculates the force using the equation F=qE and attempts to find the angle using trigonometric functions. Some participants suggest alternative methods for calculating the angle and inquire about the specific angle being sought.

Discussion Status

The discussion is ongoing, with participants exploring different interpretations of the angle calculation and offering suggestions for adjustments to the original approach. There is no explicit consensus on the correct method or outcome at this point.

Contextual Notes

There is a correction in the thread regarding the title of the problem, indicating a focus on the force on an electron from an electric field rather than a magnetic field. The original poster's calculations and assumptions are being questioned, particularly regarding the direction of the force relative to the electric field.

brett812718
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Homework Statement


A 17.0 g block with a charge of +1.30 10-4 C is placed in an electric field e vector = (2000 i hat - 200 j hat) N/C.
(a) What is the electrostatic force on the block?
the force is 2.61E-1N but I am having trouble finding the angle.

Homework Equations


F=qE

The Attempt at a Solution


180+tan^-1(-200/2000)=174.3 degrees but webassign said it was wrong.
 
Last edited:
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sorry the title should have said force on an electron from an elecrtic field
 
You might try writing only tan^-1 part (so you get like 6 degrees) and test this solution. Or use 90 instead of 180 deg... some diagram which angle are you looking for would be helpful.
 
I am looking for the angle made by F and the positive x axis
 
F is in the opposite direction of E right?
 

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