Question

The circuit below shows three identical resistors labeled 1, 2, and 3. The reading on the ammeter is 12.0 A. How much current flows in each resistors?

• A. 4.0 A
• B. 12.0 A
• C. 36.0 A
• D. We cannot determine the current values without knowing the resistor values.
• E. We cannot determine the current values without knowing the battery voltage.

Answer 1

The correct option is A 4.0 A

Current flowing the entire circuit $I=12.0$ A

The resistance of each resistors is equal, thus the current flowing through each resistor is equal.

Let the current through each resistor be $I^{\prime }$.

$\therefore$ $3I^{\prime }=I$

OR $3I^{\prime }=12.0$ $⟹I^{\prime }=4.0$ A