18 Kirchhoffs Law for a circuit Loop states sum of EMFs0 su

18 Kirchhoffs Law for a circuit Loop states ? sum of EMF\'s:0 ?sum of IR.drops = o sum of EMF,s_oum ofJR-drops After the saitch is closed, plots A& B represent ? t tark L or VR Tin2 2 Shich acrangement covuld work for an electcon velocitg selec tor? ?

Solution

18. Kirchoff\'s law states that the sum of IR drops = 0.

19. 2nd option is correct for this. In case of RC circuits, charging of capacitor takes place hence voltage across capacitor increases. so 2nd option is correct.

20. 3rd option is correct. The magnetic force acts downwards and the electric force acts upwards hence this is how the velocity selector works.