Question

PLEASE ANSWER BOTH:)

Question 3: Which of the following circuits of identical light bulbs and batteries would draw the greatest current from the battery? @ (A) (B) (C) (D) (E) Question 4: A circuit of ohmic resistors is shown in the diagram to the right. Which of the following is the current flowing through the resistor Ri? Y A) 4 A B) 2 A C) 1 A D) 0.5 A E) O A XW R2 = 202 R2 = 2012 w R = 2002 R= 40 0 www HE V battery = 160 V

Answer 1

Let every bulb resistance or and voltage & = E. A) (RIIR) + (RlIR) to ckt-A) equivalent Resistance. R. current, IA = ElR. 2 cet - B equivalent resistance 8 + CRIERIIR) srpf/3= GR { 38 :. Isa 4R equivaent Resistane = 2Rx8/2 = 5 cute ह le) RE Ic= SR equivalent resistance elet-b> 3R. Elze 1 J. [ja A equivalent resistance ckt - b) 28, E 2R 톬 IR = Good ciruit is las I Aa Ell of Grate est current A

aurrent through Ria current of ckt. I RL &3 1 A RI Ry :y=160Y -20 "R1=202 R2 = 206, R3=202 Rua yon. equivalent resistane between AB point is (R21R 3) 11 Rg = 402 11402 . equivalent resistance of Whole circuit R = (20+20) R = you. A 24A 90 :-2,= ☆ : 160 A Arin A 4 A A 44