If the step response of an initially relaxed circuit is known, then the ramp response can be obtained by

A)     Integrating the step response

B)      Differentiating the step response

C)      Integrating the step response twice

D)     Differentiating the step response twice

If a capacitor is energised by a symmetrical square wave current source, then the steady state voltage across the capacitor will be

A)     Square wave

B)      Triangular wave

C)      Step wave

D)     Impulse wave

Copper behaves as a

A)     Conductor always

B)      Conductor or dielectric depending on the applied electric field strength

C)      Conductor or dielectric depending on the frequency

D)     Conductor or dielectric depending on the electric current density