The speed will vary as a sin function because of the simple harmonic motion. Now, the point Q will have positive charge for half cycle as the rod is going to the left [Lenz law = L(v x B)] and then when the rod is coming back, the charge will be negative, so the potential will be negative.
So, the option (4) is the answer for point Q.
A conducting rod has been attached to two helical springs and held stationary as shown in...
3. A conducting rod hangs from two conducting springs with their upper ends fixed at points X and Y. The rod is in a uniform magnetic field, B, that is directed out of the page. A battery is connected between points X and Y as shown, which results in a current, I, in the rod. The rod is displaced downward and eventually comes to equilibrium Battery Which point, X or Y, is connected to the positive terminal of the battery?...
Consider a cylindrical capacitor like that shown in Fig. 24.6. Let d = rb − ra be the spacing between the inner and outer conductors. (a) Let the radii of the two conductors be only slightly different, so that d << ra. Show that the result derived in Example 24.4 (Section 24.1) for the capacitance of a cylindrical capacitor then reduces to Eq. (24.2), the equation for the capacitance of a parallel-plate capacitor, with A being the surface area of...
1. Figure G: The ideal battery has an emf of 14 V. What is the current (A) in R a) 0.200 D0.250 b) 1.00 g) 0.100 c)0.500 h)0.235 2. Figure C shows, in cross section, a spherical conducting shell that surrounds a particle of charge -2e. The shell d) 0.667 i) 1.23 e) 0.750 has a net charge of -6e. What is the magnitude (N/C) of the electric field at point P, at distance2.00 m from the j)0.820 center of...
summarizr the followung info and write them in your own words and break them into different key points. 6.5 Metering Chamber: 6.5.1 The minimum size of the metering box is governed by the metering area required to obtain a representative test area for the specimen (see 7.2) and for maintenance of reasonable test accuracy. For example, for specimens incorporating air spaces or stud spaces, the metering area shall span an integral number of spaces (see 5.5). The depth of...
summatize the following info and break them into differeng key points. write them in yojr own words
apartus
6.1 Introduction—The design of a successful hot box appa- ratus is influenced by many factors. Before beginning the design of an apparatus meeting this standard, the designer shall review the discussion on the limitations and accuracy, Section 13, discussions of the energy flows in a hot box, Annex A2, the metering box wall loss flow, Annex A3, and flanking loss, Annex...