Electronic Principles
Which one of the following statements is true for voltage in a parallel circuit?

The total voltage is equal to the sum of the voltages across the individual branches in a parallel circuit
The total voltage in a parallel circuit is always less than the value of the smallest voltage
The total voltage in a parallel circuit is equal to the average value of the individual voltages
None of these
The total voltage of a parallel circuit is the same as the voltages across each branch

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Electronic Principles
In a pure inductor:

ac current and voltage are exactly in phase
None of these
ac current lags the voltage by 90 degree
ac current is converted to dc voltage
ac current leads the voltage by 90 degree

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

an increase in current through the coil causes no further increase in the mmf
the core is permitted to move freely within the coil
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

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