Question

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

The type of the circuit element is:

• A. Capacitance of 2 F
• B. Resistance of 2Ω
• C. Capacitance of 1 F
• D. A voltage source of e.m.f 1 V

Answer 1

Answer: (C)

Capacitance of 1 F

Answer 2

In case of a capacitor

q = CV

∴ i = = C

= $\frac { 4.0 } { 4.0 }$ V/s = 1.0 V/s

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