Falling raindrops frequently develop electric charges. does this create noticeable forces between the droplets? suppose two 1.8 mg drops each have a charge of +29 pc. the centers of the droplets are at the same height and 0.36 cm apart.

F = 5.83 10⁻¹⁷ N

Explanation:

The electric force is given by

    F = k q₁  q₂ / r²

With Gauss's law electric field flow is equal to the charge inside the Gaussian surface, if we make a spherical surface around each drop, the force independent of small deformations due to air resistance

   q₁ = q₂

   F = 8.99 10⁹ (29 10⁻¹²)² / (0.36 10⁻²)²

   F = 5.83 10⁻¹⁷ N

As the two drops have a charge of the same sign they repel

d

explanation:

v=uf/(u-f)

= 5.10/(5-10) convex lens has positive focal length

=50/-5

=-10 cm (formed at other side)

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.