Question

1-Calculate the electric potential due to a dipole whose dipole moment is 3.8×10⁻³⁰ C⋅mC⋅m at a point rr = 3.2×10⁻⁹ mm away. Suppose that r≫ℓr≫ℓ, where ℓℓ is the distance between the charges in the dipole.

If this point is 60 ∘∘ above the axis but nearer the negative charge.

Express your answer to two significant figures and include the appropriate units.

2- The charge on a capacitor increases by 15 μCμC when the voltage across it increases from 93 VV to 119 VV .

What is the capacitance of the capacitor?

Express your answer using two significant figures and include the appropriate units.

Answer 1

The potential for a dipole at any point is given by,

Where is the dipole moment of the dipole.