(1) A charged particle is moving perpendicular to a magnetic field in a circle with a radius r. The magnitude of the magnetic field is increased. Compared with the radius of the circle for the first particle, is the radius of the circular path for the second particle (A) smaller. (B) larger. (C) equal in size. (D)It is impossible to determine. (2) A parallel-plate capacitor is charged and then is disconnected from the battery. By what factor does the stored energy change when the plate separation is then doubled? (A) It becomes four times larger. (B) It becomes two times larger. (C) It becomes one-half as large. (D) It becomes one-fourth large.

(1) A charged particle is moving perpendicular to a magnetic field in a circle with a radius r. The magnitude of the magnetic field is increased. Compared with the radius of the circle for the first particle, is the radius of the circular path for the second particle (A) smaller. (B) larger. (C) equal in size. (D)It is impossible to determine. (2) A parallel-plate capacitor is charged and then is disconnected from the battery. By what factor does the stored energy change when the plate separation is then doubled? (A) It becomes four times larger. (B) It becomes two times larger. (C) It becomes one-half as large. (D) It becomes one-fourth large.

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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Concept explainers

Magnetic Field Of Coaxial Cable

The word coaxial means same axis. So for a long straight cable to be coaxial, it must have concentric cylindrical shaped conductor around it. Coaxial cable (popularly called ‘coax’) has various applications ranging from current conductors to radiofrequency signal transmitters. This cable has lower emission losses and provides protection from electromagnetic interference which allows signals with less power to transmit over longer distances.For example, currents produced in the pickup of a stereo turntable generally travel to the amplifier through a coaxial cable.The self-inductance of a coaxial cable is another important characteristic, because it influences the propagation of electrical signals in the cable.

Question

(1) A charged particle is moving perpendicular to a magnetic field in a circle with a
radius r. The magnitude of the magnetic field is increased. Compared with the
radius of the circle for the first particle, is the radius of the circular path for the
second particle
(A) smaller.
(B) larger.
(C) equal in size.
(D)It is impossible to determine.
(2) A parallel-plate capacitor is charged and then is disconnected from the battery. By
what factor does the stored energy change when the plate separation is then
doubled?
(A) It becomes four times larger.
(B) It becomes two times larger.
(C) It becomes one-half as large.
(D) It becomes one-fourth large.

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