Find the internal resistance of the battery

Reference no: EM13243327

An electric heater is used to heat up 3.00× 102 kg of water from 10.0°C to 80.0°C in twenty minutes. Assuming that the heater is connected to a 120-V (rms) source and all electric power is used to heat the water, what is the resistance of the coil in the heater? The specific heat of water is 4186 J/(kg K).

The current going through a battery is I1 when it is connected to a resistor of resistance R1. If a second resistor of resistance R2 is added to the circuit parallel to the first resistor, the current through the battery increases to 3I1. What is the ratio R1/R2?

When a 14.4-V car battery delivers a current of 60.0 A, the power consumed on its internal resistance is 36.0 W, what is

(a) the internal resistance of the battery and

(b) the resistance of the load?

Reference no: EM13243327

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