What is the Magnitude of the Electric Field?

AI Thread Summary
To find the magnitude of the electric field given a force of 14 N on a charge of 2.1E-9 C, the equation E = F/q can be used. The initial attempt to use E = Kq'/r^2 was hindered by the lack of distance information. The discussion highlights the importance of using the correct formula when calculating electric fields. Clarification on the use of E = F/q was provided, confirming its applicability in this scenario. Understanding the relationship between force, charge, and electric field is crucial for accurate calculations.
Covert Liason
Messages
2
Reaction score
0
1. A force of 14 N exists on charge q, which is 2.1E-9 C. What is the magnitude of the electric field?



2. Relevant equation is E=Kq'/r^2



3. I attempted using the equation above but the question doesn't include any distance. Is there another equation I should use?
 
Physics news on Phys.org
Can you use E = F/q?
 
Yea I just realized that soon after. Thank you for the quick reply anyway
 
No problem!
 
Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
Back
Top