Final answer:
The electric current flowing through a portable CD player, which uses four 1.5V batteries and provides a resistance of 10000 Ohms, is calculated using Ohm's Law, resulting in 0.6 mA of current.
Step-by-step explanation:
The student's question pertains to the calculation of electric current flowing through a portable CD player that is powered by batteries. To find the amount of current, we apply Ohm's Law which is I = V/R, where I is the current, V is the voltage, and R is the resistance. With four 1.5V batteries connected in series, the total voltage supplied to the CD player is 1.5V × 4 = 6V. The resistance given is 10000 Ohms. Thus, the current flowing through the CD player can be calculated as:
I = V/R = 6V / 10000 Ohms = 0.0006 A or 0.6 mA (milliamps).
This formula and calculation are fundamental aspects of the study of electric circuits in physics, which is typically covered in high school curricula.