An electron orbits around a proton in a hydrogen atom. The position of the electron at one moment is shown in the sketch. What is the direction of electric field at the position of electron due to the proton? Answer choices are given as A, B, C andD in the sketch. electron C

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

34. Figure P15.34 shows the electric field lines for two point charges separated by a small distance. a. Determine the ratio 91/92. b. What are the signs of q₁ and 92? Figure P15.34 92 91

A +7.5 nC point charge and a -2.0 nC point charge are 3.0 cm apart. What is the electric field strength at the midpoint between the two charges?A. 3.3 × 103 N/C         B. 5.7 × 103 N/CC. 2.2 × 105 N/C         D. 3.8 × 105 N/C

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.

Three equal negative point charges are placed at three of the corners of a square of side d as shown in the figure. Which of the arrows represents the direction of the net electric field at the center of the square? Select one: O a. B O b. The field is equal to zero at point P. O c. A O d. C O e. D

An oil drop with a mass of 5.74 x 10-16 kg is suspended between two horizontal parallel plates. The magnitude of the electric field between the plates is 35.00 x 10° N/C. The magnitude of the charge on the drop is A. 8.00 × 10-16 C B. 1.13 × 10-18 C C. 1.60 × 10-19 C D. 1.15 × 10-19 c

Four charges ?, −? ?, and −?, are located at equally spaced intervals on the ? axis. Their? values are −3?, −?, ?, and 3?, respectively.a. Derive an expression for the total electric field for points along the ?-axis.b. Prove that the electrostatic field is zero on the ?-axis at the point? = ?√((9 − 3^(2/3)) / (3^(2/3) − 1)) ≈ (2.53)?