What does the no deflection position in the galvanometer of potentiometer experiment tell us about the flow of current ?

In the following diagram the deflection in the galvanometer in a potentiometer circuit is zero. Then:-

In the following diagram the deflection in the galvanometer in a potentiometer circuit is zero. Then:-

In the following diagram the deflection in the galvanometer in a potentiometer circuit is zero. Then:-

The observation made of Faraday from the experiments on electromagnetic induction is (are) that ________. (A) the deflection in the galvanometer increases when a strong magnet is used (B) the induced current in the coil is alternating in nature

In the experiment of potentiometer, at balance, there is no current in the

What does a line spectrum tell us about the structure of an atom?

See the given figure below and answer the given questions? What does the experiment tell about?