In an experiment to find emf of a cell using a potentiometer, the null-point length for a cell of emf 1.5 V is 60 cm. If this cell is replaced by another cell of emf E, the null-point length increases by 40 cm. If E = x/10 V, the value of x is ______.
Physics · Circular Motion
In an experiment to find emf of a cell using a potentiometer, the null-point length for a cell of emf 1.5 V is 60 cm. If this cell is replaced by another cell of emf E, the null-point length increases by 40 cm. If E = x/10 V, the value of x is ______.