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PHYS 1P22/92

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Finding the forces exerted by several charges (Law of superposition):
Electric forces are vectors. This means that they can be superimposed.

Two point charges q₁ (=+3µC) and q₂ (=+2µC) are 30 cm apart and lie in x-axis. A thrid charge q₀ (=+4µC)is placed between the intial two charges at 10 cm from q₁, which is located at the origin. What is the net electrostatic force acting on the charge q₀ ? Electrostatic constant = 9.0x10⁹ N.m²C^-2

[Optional] Two point charges q₁ (=+2µC) and q₂ (=-2µC) are 10 cm apart and lie in x-axis. A thrid charge q₀ (=+1µC)is placed at 4 cm, and 60^o from q₁, which is located at the origin. What is the net electrostatic force acting on the charge q₀ ? Electrostatic constant = 9.0x10⁹ N.m²C^-2

[Optional] These three point charges q₀ (=+4µC), q₁ (=+3µC), and q₂ (=+2µC) are located at the corners of a square of length 10 cm. A fourth charge q₃ (=+1µC) is placed at the 4th corner. What is the net electrostatic force acting on the charge q₃ ? Electrostatic constant = 9.0x10⁹ N.m²C^-2