How is an electric field determined?

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An electric field is defined as the region surrounding a charged particle that exerts force on other charges. To determine the electric field, one can use the equation E = F/q, where F is the force experienced by a charge q. The specific equation for calculating the electric field varies based on the charge configuration, such as point charges, lines of charge, or charged planes. In some cases, the electric field may be provided directly in the problem statement. Understanding these principles is essential for solving related physics problems.
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I know that an electric field is a region that surrounds a charged particle and exerts a force on the particle, but I don't know how to determine an electric field.
 
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I am assuming you need to find the equation for the electric field?

Remember that E=\frac{F}{q} where F is the force felt by an electrically charged object with charge q.
 
It depends on the problem being asked. Your textbook should have the equation for the electric field due to a point charge. Perhaps it also has equations for the electric fields of a line of charge as well as a charged plate or plane.

And sometimes, the electric field is simply a given in the problem statement.
 
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}...
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