Suppose the charge of a proton and an electron differ slightly. One of them is –e, the other is (e + e). If the net of electrostatic force and gravitational force between two hydrogen atoms placed at a distance d (much greater than atomic size) apart is zero, then e is of the order of [Given mass of hydrogen mh = 1.67 × 10–27 kg]
Suppose the charge of a proton and an electron differ slightly. One of them is –e, the other is (e + e). If the net of electrostatic force and gravitational force between two hydrogen atoms placed at a distance d (much greater than atomic size) apart is zero, then e is of the order of [Given mass of hydrogen mh = 1.67 × 10–27 kg]

(1) 10–23 C                                   (2) 10–37 C

(3) 10–47 C                                   (4) 10–20 C

Solution: Answer (2)