Wuhan ur recruitment

According to the circuit diagram, the sliding rheostat is connected in series with the fixed value resistor, the voltage measured by the voltmeter is unchanged, and the current in the circuit is measured by the ammeter.

When the slider of the sliding rheostat moves to the right, the resistance connected to the circuit becomes larger, and the total resistance in the circuit becomes larger.

∫I = UR，

The current in the circuit decreases, that is, the reading of the ammeter decreases.

So, the answer is: bigger; ? Become bigger; Constant; I = UR becomes smaller.