Ohm s law states that the relationship between the voltage Vacross a resistor in volts the electrical current I passing through the resistor in ampheres amps and a quantity R known as the resistance in ohms is given by V IR Suppose that the voltage across the resistor is held constant at 40 volts If the resistance is steadily decreasing at a rate of 0 2 ohms per second at what rate is the current changing at the moment that the resistor reaches 5 ohms