Basic Physics II Evidences - DrJJ - UiTM

21. What happens to a positive charge that is placed at rest in a uniformmagnetic field? (A uniform field is one whose strength and directionare the same at all points.)(a)(b)(c)(d)(e)It moves with a constant velocity since the force has a constantmagnitude.It moves with a constant acceleration since the force has aconstant magnitudeIt moves in a circle at a constant speed since the force is alwaysperpendicular to the velocity.It accelerates in a circle since the force always perpendicular tothe velocity.It remains at rest since the force and the initial velocity are zero.22. Figure 14 shows an electron moving horizontally towardsscreena screen. The electron moves along the paththat is shown because of a magnetic force caused bya magnetic field. In whatdirection does that magneticfield point?-qB?(a) Towards thetop of the page(b) Towards thebottom of the page v(c) Into the pageFigure 14(d) Out of the page(e) The magnetic field is in the direction of the curved path.23. Wire 1 has a large current i flowing out of the page (●), as shown inFigure 15. Wire 2 has a large i flowing into the page (X). In whatdirection does the magnetic field point at position P?Wire 1PWire 2X13. Figure 9 shows a hollow conducting metal sphere which was giveninitially an evenly distributed positive (+) charge on its surface. Then apositive charge +Q was brought up near the sphere as shown. What isthe direction of the electric field at the center of the sphere after thepositive charge +Q is brought up near the sphere?Figure 9+Q(a)(b)(c)(d)(e)LeftRightUpDownZero field14. Figure 10 shows an electric charge q located at the center of a hollowuncharged conducting metal sphere. Outside the sphere is a secondcharge Q. Both charges are positive. Choose the description below thatdescribes the net electrical forces on each charge in this situation.(a) Both charges experience thesame net force directed awayfrom each other.(b) No net force is experienced byeither charge.+q+Q(c) There is no force on Q but a netforce on q.Figure 10(d) There is no force on q but a net force on Q.(e) Both charges experience a net force but they are different fromeach other.USE THE FOLLOWING ELECTRIC FIELD DIAGRAM FOR QUESTION 1515. What is the direction of the electric force on a negative charge at pointP in Figure 11?i outFigure 15i in(a) (b) (c) (d) (e) None of theaboveFigure 1110Prepared by Dr. J.J.Applied Sciences Education ResearchGroup, FSG, UiTM, Shah AlamCall: 03-55444593; H/P:019-355-1621Email: drjjlanita@hotmail.comWeb:http://drjj.uitm.edu.my7Prepared by Dr. J.J.Applied Sciences Education ResearchGroup, UiTM, Shah AlamCall: 03-55444593; H/P:019-355-1621Email: drjjlanita@hotmail.comWeb:http://drjj.uitm.edu.my