Two particles, each with a charge of magnitude 12 nC, are at two of the vertices of an equilateral triangle with edge length 2.0 m. What is the magnitude of the electric field at the third vertex if (a) both charges are positive and (b) one charge is positive and the other is negative?

An electric dipole is formed from ±1.0 nC point charges spaced 2.0 mm apart. The dipole is centered at the origin, oriented along the y-axis. What is the electric field strength at the points (a) (x, y) = (10 mm, 0 mm) and (b) (x, y) = (0 mm, 10 mm)?

Two particles having charges q1 = 0.500 nC and q2 = 8.00 nC. The first charge is located at x=0, y = 3 cm and the second charge is located at x = 5 cm, y = 0. What is the magnitude and direction of the electric field at the origin (x = 0, y = 0)?

Four point charges are located at the corners of a square. Each charge has magnitude 3.10 nC and the square has sides of length 2.50 cm. Find the magnitude of the electric field (in N/C) at the center of the square if all of the charges are positive and three of the charges are positive and one is negative. (a)all the charges are positive   (b)three of the charges are positive and one is negative

What should be the direction and magnitude of the vertical electric field that will balance the weight of a plastic sphere with the charge Q= +1.5 nC and mass m= 1.8 g? 3.2 x 10^5 N/C positive y-direction 1.2 x 10^6 N/C in +y-direction 1.2 x 10^6 N/C in negative y-direction 3.2 x 10^5 N/C in negative y-direction

The cockroach Periplaneta americana can detect a static electric field of magnitude 9.00 kN/C using their long antennae. If the excess static charge on a cockroach is modeled as point charges located at the end of each antenna, what magnitude of charge q would each antenna possess in order for each antennae to experience a force of magnitude 4.50 µN from the external electric field? Calculate q in units of nanocoulombs (nC). q = nC

d 00 = A semicircular wire of radius R is uniformly charged with Q₁ -0.3Q and located in a two dimensional coordinate system as shown in the figure. A point charge Q2-9Q is placed at 0.36 R on the y-axis. Determine the electric field at point o in terms of kQ/R2F where f is the unit vector. Take mt=3.14 and provide your answer with two decimal places Answer: Q₁ Q₂ R 0