A potentiometer PQ is set up to compare two resistances as shown in the figure. The ammeter A in the circuit reads 1.0 A when two way key K₃ is open. The balance point is at a length $$\ell $$₁ cm from P when two way key K₃ is plugged in between 2 and 1, while the balance point is at a length $$\ell $$₂ cm from P when key K₃ is plugged in between 3 and 1. The ratio of two resistances $${{{R_1}} \over {{R_2}}}$$, is found to be :

Which of the following statements is false?

In the given circuit, the current in each resistance is:

When a current of 5 mA is passed through a galvanometer having a coil of resistance 15$$\Omega $$, it shows full scale deflection. The value of the resistance to be put in series with the galvanometer to convert it into a voltmeter of range 0 – 10V is: