What would be the speed of the charge

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To find the speed of a charge where the electric force equals the magnetic force, one must use the relationship between these forces. The electric force (F_e) is given by F_e = qE, where q is the charge and E is the electric field strength. The magnetic force (F_m) is given by F_m = qvB, where v is the speed of the charge and B is the magnetic field strength. Setting these forces equal (F_e = F_m) allows for the equation qE = qvB, which simplifies to v = E/B. Substituting the given values, the required speed of the charge can be calculated.
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An area has an electric field of 2.1*10^8N/C and a Mag. field of 0.90T. What would be the speed of the charge have to be to go into the area in order for the electric force on the charge equal the magnetic force on the charge?

I am unsure how to approach this question ...can someone please help?!
 
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Thehumbleguy said:
An area has an electric field of 2.1*10^8N/C and a Mag. field of 0.90T. What would be the speed of the charge have to be to go into the area in order for the electric force on the charge equal the magnetic force on the charge?

I am unsure how to approach this question ...can someone please help?!

Is the electric force a function of speed? What is the electric force on the moving carge?

The magnetic force?
 

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