Electric Force in an Electric Field

Practice Questions

AP Physics 2 › Electric Force in an Electric Field

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There is a uniform electric field of $35\frac{N}{C}$ pointing north. What force will a particle of experience?

There are two point charges in a vacuum, $-4\mu C$ and $5 \mu C$ , kept from each other. What is the force experienced by the charges?

$k=9\cdot 10^9\frac{Nm^2}{C^2}$

In the lab, you have an electric field with a strength of $2160\frac{N}{C}$ . If the force on a particle with an unknown charge is , what is the value of the charge on this particle?

In a region of space there is an electric field. The field is directed straight down and has a field strength of $2500\frac{N}{C}$ . Into this region of space, an electron is moving north with a velocity of $v=2.4\times10^6\frac{m}{s}$ . What will the electron's acceleration be in this region of space? Include both magnitude and direction.

$m_e=9.11\cdot10^{-31}kg$

$q_e=-1.6\cdot10^{-19}C$

Dipole in electric field

An electric dipole, with its positive charge above the negative charge, is in a uniform electric field that points to the right, as diagrammed above. What is the net torque and the net force on the dipole in this electric field?

Two charges in a field

In a region of space, there is a uniform electric field whose magnitude is $E=1500\frac{N}{C}$ directed to the right as diagrammed above. There are two charged particles in the field: a positive particle at the origin with charge $q=1.3*10^{-6},C$ and another at point (0,2) meters with charge $q=2.4*10^{-6},C$ as shown. What is the net force on the $2.4*10^{-6},C$ particle located at (0,2) meters?

Assume that the uniform electric field has a magnitude of $3.5* 10^4 \frac{N}{C}$ , which points in the positive x-direction. What is the force magnitude this field exerts on a $2 \mu C$ charge?