BReview I Constants Part A The electric potential in a region of space is V =( 250 z² – 200 y) V, where z and y are in meters. What is the strength of the electric field at (z, y) = (3.0m, 3.0m) ? Express your answer using two significant figures. E = 1900 V/m Submit Previous Answrs v Correct Correct answer shown. Your answer 1921. = 1921 V /m was either rounded differently or used a different number of significant figures than required for this part. Part B What is the direction of the electric field at (z, y) = (3.0m, 3.0m) ? Give the direction as an angle (in degrees) counterclockwise from the positive z-axis. Πν ΑΣφ 0 = 38.66 " counterclockwise from the positive z-axis Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining

BReview I Constants Part A The electric potential in a region of space is V =( 250 z² – 200 y) V, where z and y are in meters. What is the strength of the electric field at (z, y) = (3.0m, 3.0m) ? Express your answer using two significant figures. E = 1900 V/m Submit Previous Answrs v Correct Correct answer shown. Your answer 1921. = 1921 V /m was either rounded differently or used a different number of significant figures than required for this part. Part B What is the direction of the electric field at (z, y) = (3.0m, 3.0m) ? Give the direction as an angle (in degrees) counterclockwise from the positive z-axis. Πν ΑΣφ 0 = 38.66 " counterclockwise from the positive z-axis Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter7: Electricity

Section: Chapter Questions

Problem 2Q

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In a certain region of space, the electric field is zero. From this fact, what can you conclude about the electric potential in this region? (a) It is zero, (b) It does not vary with position. (c) It is positive. (d) It is negative. (e) None of those answers is necessarily true.
A long cylinder of aluminum of radius R meters is charged so that it has a uniform charge per unit length on its surface of . (a) Find the electric field inside and outside the cylinder, (b) Find the electric potential inside and outside the cylinder, (c) Plot electric field and electric potential as a function of distance from the center of the rod.
A particle of mass m and charge q moves along a straight line away from a fixed particle of charge Q. When the distance between the two particles is r0 , q is moving with a speed v0 . (a) Use the work-energy theorem to calculate the maximum separation of the charges. (b) What do you have to assume about v0 to make this calculation? (c) What is the minimum value of v0 such that q escapes from Q?
In nuclear fission. a nucleus splits roughly in half. (a) What is the potential 2.00 10-14 m from a fragment that has 46 protons in it? (b) What is the potential energy in MeV of a similarly charged fragment at this distance?
The practical limit to all electric field in air is about 3.00106 N/C. Above this strength, sparking rakes place because air begins to ionize, (a) At this electric field strength, how far would a proton travel before hitting the speed of light (ignore relativistic effects)? (b) Is it practical to leave air in particle accelerators?
What is the capacitance of a parallel capacitor with matal plates each of area 1.0 m², separated by 1mm. What charge is stored in this capacitor if a voltage of 3kV is applied to it?
Consider the electric field of a point charge.At point A the electric field strength is 9 V/m, at point B the electric field strength is 36 V/m. We measure the strength of the electric eld at the midpoint of the interval AB. What can be the measured value?
A simple and common technique for accelerating electrons is shown in the figure, which depicts a uniform electric field between two plates. Electrons are released, usually from a hot filament, near the negative plate, and there is a small hole in the positive plate that allows the electrons to pass through.Randomized VariablesE = 2.7 × 104 N/C Calculate the horizontal component of the electron's acceleration if the field strength is 2.7 × 104 N/C. Express your answer in meters per second squared, and assume the electric field is pointing in the negative x-direction as shown in the figure.
An electron flies into a parallel plate capacitor with length L=10cm and width d=2cm, with an electric field E=1000kV/cm (see the Fig.). 1. What should the maximum velocity be for the particle to be trapped, i.e., hit capacitor plates? [electron mass -mp= 9.1 × 10-31kg, its charge is q= −1.6 × 10−19C, the electric force is found as ? = ??]. Assume that electron flies right in the middle of a capacitor. 2. Find and plot its trajectory for this case (that is, case of maximum velocity).
Calculate the value of electrical potential needed to accelerate a hydrogen and helium ions to the velocity 2000m/s.
Two large parallel plates are placed horizontally with respect to each other and are then connected to a 100-V battery. If the distance between the plates is 1 cm, the uniform electric field between the plates is 104 N/C in the upward direction as shown by the vectors in the figure. If the electron is released from rest at the upper plate, calculate: i. kinetic energy of the electron after traveling 1 cm to the lower plate, and ii. the time required for it to travel this distance.
Two large parallel plates are placed horizontally with respect to each other and are then connected to a100-V battery. If the distance between the plates is 1 cm, the uniform electric field between the plates is104 N/C in the upward direction as shown by the vectors in the figure. If the electron is released from restat the upper plate, calculate:i. kinetic energy of the electron after traveling 1 cm to the lower plate, andii. the time required for it to travel this distance.