Question

During open-heart surgery, a defibrillator can be used to bring a patient out of cardiac arrest. The resistance of the path is 500 Ω, and a 10.0-mA current is needed. What voltage should be applied?

a) 5.00 V
b) 50.0 V
c) 500 V
d) 0.05 V

Answer 1

The voltage that should be applied is 5.00 V.

Step-by-step explanation:

To calculate the voltage needed, we can use Ohm's Law which states that V = IR, where V is the voltage, I is the current, and R is the resistance.

Given that the resistance is 500 Ω and the current is 10.0 mA (or 0.010 A), we can substitute these values into the equation: V = (0.010 A)(500 Ω) = 5.00 V.