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

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
None of these
The current through a resistance is proportional to the value of resistance and the IR drop across it

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Electronic Principles
The core of an electromagnet is said to be in saturation when:

frequent changes in the direction of current through the coil causes heating effects in the core material
changing the polarity of the current in the coil changes the polarity of the magnetic field around the core
None of these
the core is permitted to move freely within the coil
an increase in current through the coil causes no further increase in the mmf

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