A device for heating a cup of water in a car connects to the car's battery, which has an EMF= 10.0 V

A device for heating a cup of water in a car connects to the car's battery, which has an EMF = 10.0 V and an internal resistance rint= 0.07 Ω . The heating element that is immersed in the cup of water is a resistive coil with resistance R.

David wants to experiment with the device, so he connects an ammeter into the circuit and measures 10.0 A when the device is connected to the car's battery. From this, he calculates the time to boil a cup of water using the device. If the energy required is 100 kJ , how long does it take to boil a cup of water?

A. Which of the following four circuit diagrams best represents the experiment described in this problem?

B. If Vab is the potential difference across the resistive coil of resistance R, P is the power input to the coil, E is the energy required to boil a cup of water, and t is the time needed to heat a cup of water using the electric device, which of the following quantities are known in this problem? Some of the quantities shown below are defined in the circuit diagrams in Part A.

C. Neglecting heat losses in the system, what is the amount of time t will it take to boil the water in the cup?

D. The energy delivered to the resistive coil is dissipated as heat at a rate equal to the power input of the circuit. However, not all of the energy in the circuit is dissipated by the coil. Because the emf source has internal resistance, energy is also dissipated by the battery as heat. Calculate the rate of dissipation of energy Pbat in the battery.