25. The electric field intensity at a point situated 4 metres from a point charge is 200 N/C. Ifthe distance is reduced to 2 metres, the field intensity will be(a) 400 N/C(b) 600 N/C(c) 800 N/C(d) 1200 N/C 24. The electric flux density, D, in free space for E = 6î – 2ĵ + 3k Vm-1 is (e• = 8.854 x10-12 F/m)(a) 53.12î – 17.7j + 26.55k(b) 50.128 – 18.7ĵ + 25.55k(c) 54.128 – 15.7j + 24.55k(d) none of them

25. Given : r = 4 m E = 200 N/C

25. The electric field intensity at a point situated 4 metres from a point charge is 200 N/C. If the distance is reduced to 2 metres, the field intensity will be (a) 400 N/C (b) 600 N/C (c) 800 N/C (d) 1200 N/C

25. The electric field intensity at a point situated 4 metres from a point charge is 200 N/C. If the distance is reduced to 2 metres, the field intensity will be (a) 400 N/C (b) 600 N/C (c) 800 N/C (d) 1200 N/C

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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4. The electric field near a charged, long, narrow, wire (think of monofilament, fishing line) was hinted at in homework 01 by solving a source charge integration problem. The electric field to the side of a charged, narrow wire (or rod) of length 2a was found to be 1 xdy Q 2a 1 B = 47², (^) (2² +2² ²2² = 425, (204) (2√2² + 2² Απερ (1). 3/2 ATTE a 1 Απε simpler expression E = Q o(x√x² + a² Then, one can take the limit as the length a tends toward infinity to obtain the much 20₁ 2TE T r. Here, we have transitioned from a distance r to the side of the wire (in the x-y plane) to a more general, radial distance out from the wire in any plane (not just the z-y plane). This same simpler equation can be very easily obtained by applying Gauss' Law using an appropriate Gaussian surface that surrounds part of an infinitely long, charged wire. Find this derivation (in a book or online) and rewrite it below. Add verbal explanations to take the reader through the derivation, equation by equation.
#1. The electric field strength at one point near a point charge is 1000 [N/C]. What is the field strength if the distance from the point charge is doubled? A) 125 [N/C] B) 250 [N/C] C) 1000 [N/C] D) 2000 [N/C] E) None of above D OE A B OC
2. Three charges and their specific locations are given as follows: q1 = - 25 nC; (0, 2.00 cm) q2 = + 35 nC; (-1.00 cm, 4.00 cm) q3 = + 15 nC; (-3.00 cm, 0 cm) Determine the magnitude and direction of the net electric field at the field point P (2.00 cm, 0) using component method.
9. Air becomes a conductor when the electric field strength exceeds 3.0x10^6 N/C. Determine the maximum amount of charge that can be carried by a metal sphere 2.0 m in radius.
38. Determine the force exerted on a 15nC charge if an electric field of 3.45 x 103 N/C acts on the particle. Based on the problem, what are the given values needed in calculating the electric force? Group of answer choices Fe = 1.5 x 10-9 C and E = 3.45 x 103 N/C Fe = 1.5 x 108 C and E = 3.45 x 103 N/C Fe = 1.5 x 109 C and E = 3.45 x 103 N/C Fe = 1.5 x 10-8 C and E = 3.45 x 103 N/C
4. Determine the magnitude and direction of the electric field acting on an electron that is projected onto the x-axis with an initial speed of 2.5x10^6 m/s, moves 45.0 cm, and stops due to the uniform electric field in the region.Note: The charge and mass of the electron are, respectively: q =-e = 1.6×10^-19 C and m. = 9.1×10^-31 kg.
What happens to the strength of the electric field of a single positive charge as the distance increases? What happens to the strength of the electric field of a single negative charge as the distance increases?
12. A point charge with q, = +2.5 C is located at x = -3.0 m, y = 0, and a second point charge with 9, = +4.0 C is at x = +1.0 m, y = +2.0 m. What are the components of the electric field at x = +1.0 m, y = 0? %3D %3D %3D %3D %3D
27. A small sphere with a charge of -0.60 µC is placed in a uniform electric field of magnitude 1.2 x 10° N/C pointing to the west. What is the magnitude and direc- tion of the electric force on the sphere?
3. In the figure, if Q = +30.0 µC, q = -4.00 µC, and d = 30.0 cm, what are the magnitude and direction of the electric field at point A?
3. A particle (q = 3.0 µC, m = 10 g) has a speed of 40 m/s when it enters a region where the electric field that has a constant magnitude of 100 N/C and the direction of the velocity with the electric field is 30 degree . What is the speed of the particle 5 s after it enters this region?
2. Suppose that charge #1 is positioned at the origin (x = 0 m, y = 0 m) and has a magnitude of +2.6 μC, and that charge #2 is positioned on the y-axis at y = 0.16 m and has a magnitude of -4.3 µC. Find the x- and y-components of the electric field on the x-axis at x = 0.21 m. Also, find the x- and y-components of the force on a charge of +6.3 nC placed at this point (x = 0.21 m).