Hi out there! I've been handled 3 questions which for me is rather hard and therefore I'm asking the experts. Any help would be great:) Donkey Kong Question 1) A circuit consists of a 15Ω and a 30Ω resistor connected in parallel across a battery of internal resistance 2 Ω. If 60W is dissipated by the 15 Ω resistor, calculate (a) the current in the 30 Ω resistor (b) the terminal potential difference and emf of the battery (c) the total energy dissipated in the external circuit in one minute (d) the quantity of electricity (charge) through the battery in one minute. Question 2) A coil of 20 Ω resistances is joined in parallel with a coil of R Ω resistance. This combination is then joined in series with a household apparatus A. This whole circuit is connected to 100V mains. What must be the value of R so that A shall dissipate 600W with 10A passing through it? Question 3) A person wants to move a 20W car stereo system from an old car with a 6V battery to a new car with a 12V battery. What is the resistance of the resistor that should be connected in series with the radio to limit the current, and what is its minimum power rating?