Electronic Principles
Assuming 100% efficiency, what is the power being applied to the primary winding of the transformer described in the above question?

200 W
100 W
None of these
20 W
1000 W

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Electronic Principles
A farad is defined as the amount of capacitance necessary for:

causing an ac phase shift greater than 90 degree
storing 1 V for 1 second
changing the voltage on the plates at the rate of 1 V per second when 1 A of current is flowing
None of these
dissipating 1 W of power

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Electronic Principles
Which one of the following is a statement of Kirchhoffs current law?

None of these
The current through a resistance is proportional to the value of resistance and the IR drop across it
The total current in a parallel circuit is less than the value of the smallest current
The algebraic sum of currents in a loop is equal to zero
The algebraic sum of currents entering and leaving a point is equal to zero

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