Question

Current versus time and voltage versus time graphs of a circuit element are shown in figure.

The type of the circuit element is ______.

Options

• capacitance of 2 F 

• resistance of 2Ω 

• capacitance of 1 F 

• a voltage source of e.m.f 1 V 

Answer 1

The type of the circuit element is capacitance of 1 F.

Explanation:

In case of a capacitor

q = CV

∴ i = `"dq"/"dt"` = C`("dV"/"dt")`

`"dV"/"dt" = 4.0/4.0` V/s 

= 1.0 V/s

Therefore, if C = 1 F then i = 1 × 1 = 1A (constant)