Electric Current

When both DC and AC currents flow simultaneously, the current measured by the DC ammeter is the sum of the DC current and the DC component of the AC current, while the AC ammeter measures the AC component. - For the DC ammeter, it measures the 6A DC current, as the DC ammeter responds to only the DC component.
- For the AC ammeter, the total current is 10A, which is the sum of the 6A DC and 4A AC components. Hence, the AC ammeter reads 10A. Thus, the correct answer is (A).