Question

can someone explain these to me? answers are circled

(5 pts) 19. Two parallel conducting rails are connected at one end by a resistor. A bar slides on the rails with speed v, in the direction away from the resistor. The magnetic field that is directed into the page. What is the direction of the current induced in the circuit that consists of the bar, rails and resistor? X X X (a) clockwise (b) counterclockwise (5 pts) 20. A horizontal conducting bar is moving toward the top of the page. The bar is in a region of uniform magnetic field that is directed into the page. Which end of the bar, a or b, is at higher potential, or are both ends at the same potential? x Tv x (a) both same potential (b) end b a i end a C

Answer 1

soli X X x Bar sliders away from resistor. and Hence magnetĉ flux increases with time. Because magnetie Held and Area increases. and due to change ing magnetic flux . create induced current in the circent. such that it opboses the change occur. magnetic field external going into the plane of page. then for ob losing this magnetic field. current induces counter- clockwise , such that induce magnetic field in cep ward direction. Counter-clockwise By right finger in then your direction of hand screw rute, curl the direction of current theems is showing the induce magnetić Held your induces 76 correct answer counter clock wise

उनीही 1 x x x x x ace X X X - X X X X a zo By formula = force on @. and ) f =qUXB et charge on e0 charge is its towards towards due end 7 is to higher charge potential. at © end @