3. An electric dipole is formed from 10.0 nC charges spaced 6.0 mm apart. The dipole is at the origin, oriented along the y-axis. What is the electric field strength at the points (a) : (x, y) = (0 cm, 30 cm), and (b): (x, y) = (20 cm, 0 cm)?

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

For each charge distribution: -6.0 x 10-5 C 4.0 x 10-5 C 2.0 m 9₁ L. - 6.0 x 10-5 C 3.0 m A q2 2.0 m A 3.0 m 2 - 3.0 x 10-5 C 1. 2. a. Determine the net electric field at point A for the following charge distribution. b. The magnitude of the electric field due to each charge, (i.e. calculate ε₁ and ε2), at point A. c. The net electric field at point A. a. For each part in practice question 1, find the net force on a -1.2 × 10-5 C charge placed at point A. b. How would your answer change if the sign of the charge from 2a at point A was changed? 3. Explain why the concept of a field was used to describe the force of gravity between two masses. 4. Give two reasons why the concept of a field is used again to describe the force between two charged objects.

Two 10-cm-diameter charged rings face each other, 15.0 cm apart. Both rings are charged to +50.0 nC. What is the electric field strength

A point charge Q1 = -10.0 nC is at the origin, and a second point charge Q2 = +12.0 nC is on the x axis at x = 0.500 m. Consider the electric fields E, and E, at x = -1.00 m, generated by Q1 and Q2, respectively. Which of the following is true? A. E1 points to the right, E2 points to the left. В. Ei points to the left, E2 points to the right. С. E, points to the left, E, points to the left. D. E1 points to the right, E2 points to the right.

+Q А -Q В C D There are two concentric charged hollow spheres. The inner sphere has a radius of 1 cm and a charge +Q. The outer sphere has a radius of 2 cm and a charge of -Q. Point A is inside the inner sphere, B and C are in the empty space between spheres, and point D is outside both spheres. At which point would you measure the largest electric field? O a. A O b. B O c. D o d. C