Electrostatics

Electric potential is a scalar quantity, Electric potential decreases as we move away from a positive charge, Electric potential is measured in volts, Work done against electric field increases potential energy

Electric potential is indeed a scalar quantity measured in volts. For a positive charge, potential decreases with distance (V ∝ 1/r). Work done against electric field increases potential energy. Potential at infinity is taken as zero reference, not maximum.

False

Gauss's law is universally applicable for any charge distribution. However, it is useful for calculating electric field only when there is sufficient symmetry in the charge distribution.

12μF

For capacitors in parallel: Ceq = C₁ + C₂ + C₃ = 2μF + 4μF + 6μF = 12μF. In parallel combination, capacitances add directly.

Electric field - V/m

Electric field is measured in V/m (or N/C), electric potential in volts (V), capacitance in farads (F), and electric charge in coulombs (C).