As Shown in the Figure, Three Charges Are at the Vertices

question 55

Multiple Choice

As shown in the figure, three charges are at the vertices of an equilateral triangle. The charge Q is 6.7 nC, and all the other quantities are accurate to two significant figures. What is the magnitude of the net electric force on the charge Q due to the other two charges? (k = 1/4πε₀ = 9.0 × 10⁹ N ∙ m²/C²)

• A)2.1 × 10^-3 N
• B)1.2 × 10^-3 N
• C)1.0 × 10^-3 N
• D)1.4 × 10^-3 N

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Definitions:

Differential Controls

Devices that function based on the difference in variables (such as temperature, pressure, or flow rate) to adjust or maintain system operation.

Mechanical Holding Circuit

A circuit design that maintains the current flow or signal, keeping a device like a relay activated even after the initial actuating signal is removed.

Motor Control Circuits

Electrical circuits designed to control the start, stop, speed, and direction of an electric motor.

Motor Starter

A device that controls the use of electrical power to equipment, specifically to an electric motor, by means of protection and control circuitry.