The power in an electrical circuit is given by the equation p = i2r, where i is the current flowing through the circuit and r is the resistance of the circuit. what is the current in a circuit that has a resistance of 30 ohms and a power of 2 watts

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?