Electric Circuits
Unit step function is first derivative of

 gate function.
 ramp function.
 parabolic function.
 impulse function.

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Electric Circuits
The voltage induced in an inductor is represented as,

 ratio of current through it to its inductance.
 product of its inductance and rate of change of current through it.
 ratio of its inductance to current through it.
 product of its inductance and current through it.

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