Question

he order of the ratio of electrostatic
force and gravitational force between
a proton and an electron to 2 points
(a) 10 36
(b) 10 39
(c) 10-36
(d) 10-39​

Answer 1

Answer:

Answer

Correct option is

B

2.4×10

39

Here, for an electron and a proton

Electrostatic force, ∣F

e

∣=

4πε

0

1

r

2

e

2

Gravitational force, ∣F

g

∣=

r

2

Gm

e

m

p

∴

∣F

g

∣

∣F

e

∣

=

4πε

0

1

Gm

e

m

e

2

=

6.67×10

−11

×9×10

−31

×1.66×10

−27

9×10

9

×(1.6×10

−19

)

2

=2.4×10

39