If more electric field lines leave a closed (Gaussian) surface than enter it, what can you conclude about the net charge enclosed by the surface? a. The net change has a magnitude of more than 1 Coulomb. b. The net charge has a magnitude of less than 1 Coulomb. c. The net charge enclosed is positive. d. The net charge enclosed is negative. e. Two of these

3. Four charges are located on the corners of a square of sides a = 4.5 cm as shown inproblem 1. The charges are q1 = +15.0 nC, q2 = -30.0 nC and q3 = +30.0 nC, and q4 = -15.0 nC.a. Determine the electric field in unit vector notation at the center of the square.b. If a particle of mass 1.20 mg having a charge of q5 = -25.0 nC is placed at thecenter of the square, determine the magnitude and direction of its acceleration.

If the number of electric field lines leaving a closed surface is greater than the number of electric field lines entering the surface, which one of the following statements is true?   a. no charges lie inside the surface   b. the net charge enclosed by the surface is positive   c. the net charge enclosed by the surface is negative   d. the net charge enclosed by the surface is zero

An irregular neutral conductor has a hollow cavity inside of it and is insulated from its surroundings. An excess charge of 22.0 nC is sprayed onto this conductor. a. Find the charge on the inner surface of the conductor. b. Find the charge on the outer surface of the conductor. c. Without touching the conductor, a charge of -15.0 nC is inserted into the cavity through a small hole in the conductor. Find the charge on the inner surface of the conductor in this case. d. Find the charge on the outer surface of the conductor in this case.

a. What is the magnitude and direction of the electric field at point P created by the 5 µC charge? b. What is the magnitude and direction of the electric field at point P created by the 4.2 µC charge? c. What is the magnitude and direction of the electric field at point P created by the -3.5 µC charge? d. Determine the net electric field at the point P. 5 μC (+) P 4.2 μC 1.1 cm + 3.7 cm -3.4 cm -3.5 μC

A conducting spherical shell of inner radius r1 and outer radius r2 has a charge Q on it. An additional charge, also Q, is en added to the sphere. What is the resulting charge per unit area on the outer surface of the sphere? 2 b. No answer given is correct. 4m(r₂ - r₁)² a. C. 2 47(1₂)² d. 2m(r^₂)²

a. Determine the magnitude and direction of the electric field at point P, 20 cm away from charge Q = +10?C b. Two charges are lying on the horizontal axis and are 0.2m away from each other. The charges are: ?1 =20?? ??? ?2 = −40??. Determine the magnitude and direction of the force on q1 by q2. c. An electron (q = -1.6 x 10-19 C) is initially at rest. At some time later, the electron accelerates due to a 5kV potential. Determine the change in electrical potential energy and final speed of the electron. Write down three examples of the use of electricity and magnetism in the medical field. For example, an automated external defibrillator (AED) consists of a capacitor to store electrical energy and electrode pads to deliver an electrical shock to your heart. As a result, an automated external defibrillator (AED) with CPRincreases the chances of restoring a victim’s heart rate after a sudden cardiac arrest. Use three of your ownexamples

1. Two point charges q₁ and q2 both have a charge equal to +6.0 nC and are on the y axis at y₁ = +3.0 cm and y2 = -3.0 cm respectively. a. What is the magnitude and direction of the electric field on the x axis at x = 4.0 cm? b. What is the force exerted on a third change qo= 2.0 nC when it is placed on the x axis at x = 4.0 cm?

A -9.25 nC point charge is located at the center of a conducting spherical shell. The inner/outer radii of this shell are 1.5 m and, respectively, 2.3 m. A 10 nC charge is distributed on the spherical shell. What is the magnitude of the electric field at a. r= 1.1 m? Submit Answer b. r= 1.9 m? Submit Answer Incompatible units. No conversion found between "nc" and the required units. Incorrect. Tries 1/10 Previous Tries c. r = 2.6 m? Submit Answer Incorrect. Tries 1/10 Previous Tries d. What is the charge density on the outside surface of the conducting shell? Submit Answer Incorrect. Tries 1/10 Previous Tries Tries 1/10 Previous Tries

The following diagram shows the electric field lines in a region of space containing two small charged spheres (Y and Z). Which of the following statements is correct? O a. Y and Z both are negative. O b. Y is negative and Z is positive. O C. Y and Z both are positive. Od. a. Y is positive and Z is negative.