Chapter 23.1, Problem 20SSC

To determine

To Calculate: The amount of current that flows through the power source.

Answer to Problem 20SSC

810 mA

Explanation of Solution

Introduction:

As per Ohm’s law:

  $V=IR$

Here, I is the current, V is the potential difference and R is the resistance.

In a circuit, where all the resistors are connected in series, the current in the circuit is same. The voltage across each resistor drops. The current in the circuit is equal to the voltage provided by the power source divided by the equivalent resistance of the circuit.

It is given that 810 mA current passes through one resistor, it means that 810 mA flows through the power source as well.

Conclusion:

Thus, 810 mA flows through the power source.