Question

Question 2 In the figure R1 = 5.72 Ω, R2 = 17.2 Ω, and the ideal battery has emf ε = 10.3 V. (a) what is the magnitude of current i? (b) How much energy is dissipated by all four resistors in 2.31 min? RI R2 R2 R2 (a) Number Units (b) Number Units

Answer 1

for series combination of resistances-

the equivalent resistance-

R=R1+R2+R3+.....................

for parallel combination-

1/R= 1/R1+1/R2+1/R3+.................

R=[1/R1+1/R2+1/R3+.........]^-1

THE ENERGY DISSIPATION ACROSS RESISTANCE(E)=i²Rt

i is current flowing through resistance(R).