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                                    Q. The length of a potentiometer wire is 15 m. An electron in this wire experiences a force of 4.8 \ast 10^{-19}N E.M.F. of new cell used in potentiometer is? | 
                            
| Answer» Q. The length of a potentiometer wire is 15 m. An electron in this wire experiences a force of 4.8 \ast 10^{-19}N E.M.F. of new cell used in potentiometer is? | |