In a circuit containing an inductance of zero resistance,the $e.m.f.$ of the applied $ac$ voltage leads the current by ......$^o$

In an $AC$ circuit containing only a capacitor,how does the current relate to the potential difference?

If we decrease the frequency of the applied $A.C.$ with a purely capacitive load,do $(1)$ the amplitude of $V_c$ and $(2)$ amplitude of $I_c$ increase,decrease,or remain the same?

In an a.c. circuit with pure capacitance $C$ and a.c. source $E=E_0 \sin \omega t$,the equation of instantaneous current is given by

There is no resistance in the inductive circuit. Kirchhoff's voltage law for the circuit is

$A$ coil has an inductance of $3 \ H$. The ratio of its reactance when it is first connected to an a.c. source and then to a d.c. source is: