Question

8. Calculate the electric field due to a charge of -8.0 x 10 C at a distance of 5.0 cm from it.
field
On the oil drop.​

Answer 1

Answer:

Solution

Verified by Toppr

Correct option is

A

1.04×

10 −6

Here

n=

10,E=

3.65×

−1

oil

10 4

1.26g

cm

−3

=

1.26×

−3

10 3

As the droplet is stationary, wheight of droplet =force due to electric field

or

3

4

πr

3

ρg=

neE∴

r 3

4 π ρ g

3 n e E

∴

r 3

4×3.14×1.26×

10

3

×9.8

3×10×1.6×

10

−19

×3.65×

10

4

=

1.13×

10 −18

or

r=

(1.13×

10

−18

) 1/3

1.04×

10 −6

Explanation:

hope it's helpful