Respuesta :
Magnitude of electric force = 15 x 10⁻¹⁰ N
Magnitude of weight force = 64.092 x 10⁻⁶ N
Given
Diameter of rain drop = 2.5mm
Radius = 1.25 mm = 1.25 × 10⁻³ m/sec
Drop has a charge = +15pC
15pC = 15×10⁻¹²C
Electric field (E) = 100 N/C
Electric force on the charge
= charge x electric field = qE
= 15 x 10⁻¹² x 100
= 15 x 10⁻¹⁰ N.
This force will act in upward direction as the force on the positive charge will always acts in the direction of the electric field.
Volume of rain droplet(V) = 4/3 π R³
Volume V = 4/3 x 3.14 x ( 1.25 x 10⁻³)³
= 6.54 × 10⁻⁹m³
As Density of water = 1000 kg / m³
Density =Mass/Volume
So, Mass of rain droplet = 1000 x 6.54 x 10⁻⁹ kg
= 6.54 x 10⁻⁶ kg .
Now, Weight(W) = mg
= 6.54 x 10⁻⁶ x 9.8
= 64.092 x 10⁻⁶ N.
As the electric force is 15 × 10⁻¹⁰ N
So, weight force is more than the electric force.
Hence, the magnitude of the electric force on the droplet is less as compare to the weight force.
Learn more about Electric force & weight here https://brainly.com/question/13258339
#SPJ4
