An electric field points away from a charge. What is the sign of the charge?

Particle A of charge $3.00 \times 10^{-4} \mathrm{C}$ is at the origin, particle B of charge $-6.00 \times 10^{-4} \mathrm{C}$ is at (4.00 m, 0), and particle C of charge $1.00 \times 10^{-4} \mathrm{C}$ is at (0, 3.00 m). We wish to find the net electric force on C. (a) What is the x component of the electric force exerted by A on C? (b) What is the y component of the force exerted by A on C? (c) Find the magnitude of the force exerted by B on C. (d) Calculate the x component of the force exerted by B on C. (e) Calculate the y component of the force exerted by B on C. (f) Sum the two x components from parts (a) and (d) to obtain the resultant x component of the electric force acting on C. (g) Similarly, find the y component of the resultant force vector acting on C. (h) Find the magnitude and direction of the resultant electric force acting on C.

Three point charges lie on the $x$ axis. Charge $1(+9.9 \mu C)$ is at the origin, charge 2 $(-5.1 \mu \mathrm{C})$ is at $x=12 \mathrm{cm}$, and charge $3(+4.4 \mu C)$ is at $x=15 \mathrm{cm}$. What are the direction and magnitude of the total force exerted on charge 3?

What is the net force exerted on the $0.02-\mathrm{C}$ charge by the other two charges?

Two $1.0\ \text{kg}$ masses are $4.0\ \text{m}$ apart on a frictionless table. each has $1.0\ \mu \text{C}$ of charge. What is the magnitude of the electric force exerted? What is the magnitude of the gravitational force exerted?

Two $2.0\ \text{kg}$ masses are $4.0\ \text{m}$ apart on a frictionless table. Each has $1.0\ \mu \text{C}$ of charge. What is the magnitude of the electric force exerted? What is the magnitude of the gravitational force exerted?

Two $4.0\ \text{kg}$ masses are $4.0\ \text{m}$ apart on a frictionless table. Each has $1.0\ \mu \text{C}$ of charge. What is the magnitude of the electric force exerted? What is the magnitude of the gravitational force exerted?

What is the force exerted on the $-4-\mu C$ charge by the $+3-\mu C$ charge? (A) 0.0043 N to the right (B) 0.022 N to the right (C) 0.0043 N to the left (D) 0.022 N to the left

Three point charges lie on the x axis. Charge 1 $(-2.1 \mu C)$ is at the origin, charge $2(+3.2 \mu C)$ is at $x=7.5 \mathrm{cm}$, and charge $3(-1.8 \mu C)$ is at $x=11 \mathrm{cm}$. What are the direction and the magnitude of the total force exerted on charge 1?

Particle A of charge $3.00 \times 10 ^ { - 4 }$ C is at the origin, particle B of charge $- 6.00 \times 10 ^ { - 4 }$ C is at (4.00 m, 0) and particle C of charge $1.00 \times 10 ^ { - 4 }$ C is at (0, 3.00 m). What is the y-component of the force exerted by A on C?

In case 1 a charge q is at the origin, and a charge Sq is 1 m away. In case 2 a charge q is at the origin, and a charge - Sq is 1 m away. Is the magnitude of the force exerted on the charge at the origin in case 1 greater than, less than, or equal to the magnitude of the force exerted on that charge in case 2? Explain.

Two $3.0\ \text{kg}$ masses are $4.0\ \text{m}$ apart on a frictionless table. each has $1.0\ \mu \text{C}$ of charge. What is the magnitude of the electric force exerted? What is the magnitude of the gravitational force exerted?

What is heat flux? How is it related to the heat transfer rate?

What is the electric flux through the surface of the box?