Opposition to the flow of electrons is called Resistance.
R = ९l/A
where , ९ - Specific Resistivity
l - Length of a conductor
A - Area of a conductor
Which means as resistance increases specific resistivity and length increases whereas area decreases and vice versa.
Capacitor is an electrical component which stores the electrical energy in an electrical field in an electrical circuit.
V = q/C
where , V- Voltage applied
q- charge flowing in circuit
C- Capacitance of capacitor
Inductor is an electrical component which stores the electrical energy in a magnetic field in an electrical circuit.
Note: Resistor, Inductor and Capacitor are passive elements which consume energy and convert one form energy into the other.