Electronic Principles
The south pole of a magnet is the one:

that would be attracted to the earths north magnetic pole
that would be repelled by the north pole of another magnet
that has its molecules arranged in a random pattern
that would be attracted to the earth's south magnetic pole
None of these

ANSWER DOWNLOAD EXAMIANS APP

Electronic Principles
Which one of the following statements is true for the impedance of a series RC circuit?

The impedance is greater than the sum of the resistance and capacitive reactance
None of these
The impedance is greater than either the resistance or capacitive reactance but less than their sum
The impedance is less than the sum of the resistance and capacitive reactance
The impedance is equal to the sum of the resistance and capacitive reactance

ANSWER DOWNLOAD EXAMIANS APP

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

the core is permitted to move freely within the coil
changing the polarity of the current in the coil changes the polarity of the magnetic field around the core
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
None of these

ANSWER DOWNLOAD EXAMIANS APP

Electronic Principles
Which one of the following statements is true for the voltages in a series RC circuit?

The voltage always has the same amplitude and phase for every part of the circuit
The total voltage is greater than the sum of the voltages across the resistance and capacitance
The total voltage is less than the sum of the voltages across the resistance and capacitance
None of these
The total voltage is equal to the sum of the voltages across the resistance and capacitance

ANSWER DOWNLOAD EXAMIANS APP

Electronic Principles
Which one of the following principles best describes the basic operation of an electromagnet?

None of these
Current flowing through a conductor generates a magnetic field
Like magnetic poles attract, while unlike poles repel
Like magnetic poles repel, while unlike poles attract
Current is induced in a conductor that is moving through a magnetic field

ANSWER DOWNLOAD EXAMIANS APP

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

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
None of these

ANSWER DOWNLOAD EXAMIANS APP