Calculating Electric Force: 0.15 N in +y Direction

AI Thread Summary
To calculate the electric force on a -1.2 micro Coulomb charge in a 2500 N/C electric field directed along the +y axis, the relevant formula is F = qE, where q is the charge and E is the electric field. Using this equation, the force is determined to be 0.15 N in the +y direction. The initial equation mentioned, F = k_e (Q_1 Q_2) / r^2, is not applicable in this context. The discussion emphasizes the importance of using the correct formula, often referred to as the Lorentz force law in academic settings. Understanding the distinction between these equations is crucial for solving electric force problems accurately.
samsungman
Messages
6
Reaction score
0
I need help with this problem.

What is the magnitude and direction of the elctric force on a -1.2 micro Coulomb charge at a point where the electric field is 2500 N/C and is directed along the +y axis?

It has something to do with this equation:
F=k_e \frac {Q_1 Q_2} {r^2}

I got 0.15 N, in the +y direction
 
Physics news on Phys.org
That equation will not help you. There is an equation relating the force felt by a charge in an electric field to the magnitude of the charge and the magnitude of the electric field. In your class, it may have been called the Lorentz force law. Does that help?
 

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

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...
View full post »
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Similar threads

Force acting on a charge across a hybrid medium
Replies
2
Views
1K
Direction and magnitude of electric field produced by current change
Replies
8
Views
1K
Calculate electric force using Coulomb's law (vector components are the struggle)
Replies
3
Views
1K
Confused about direction of electric field
Replies
7
Views
3K
Find the direction and magnitude of an electric field
Replies
7
Views
2K
Find the magnitude of the electric field at point P
Replies
5
Views
2K
Understanding the Radial Attraction Force between Two Electric Dipoles
Replies
19
Views
4K
Vector is a function of its position or not?
Replies
16
Views
1K
Lorentz force and induced electric field
Replies
6
Views
1K
Ion moving through electric potential difference and magnetic field
Replies
8
Views
1K

Hot Threads

Recent Insights

Back
Top