Electronic Principles
The total impedance of a parallel RLC circuit:

None of these
is maximum at the resonant frequency
always decreases as the applied frequency increases
always increases as the applied frequency increases
is equal to the sum of the values of resistance, inductive reactance and capacitive reactance

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Electronic Principles
Voltage is

The smallest electrically charged particle
None of these
The number of free electrons in an atom
Trie force that causes electrons to flow
The flow of charged particles through a material

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Electronic Principles
When a series RLC circuit is operating at its resonant frequency:

inductive reactance is greater than the capacitive reactance
inductive reactance is equal to the capacitive reactance
the difference between inductive and capacitive reactance is equal to the resistance
capacitive reactance is greater than the inductive reactance
None of these

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

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
frequent changes in the direction of current through the coil causes heating effects in the core material

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