When a.c. source is connected across a pure capacitor, the correct phase relation between current ( i _ c ) and voltage ( e _ c ) is shown in figure

Step-by-step solution

Conceptual question. The current leads the voltage by 2 radians. Ac voltage source, V = V ₀ ( t ) Charge at a given moment on the capacitor, q = CV The current through the circuit: dq dt = ( CV ₀ )= ( t ) As cos leads the function by 2 radians.