The core of an electromagnet is said to be in saturation when:
Options: 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, changing the polarity of the current in the coil changes the polarity of the magnetic field around the core
Options: the difference between the sensor input and the absolute sensed parameter., the difference between the controller output and the setting of the manipulated variable., the difference between the control setpoint value and the actual value., All of the above
Nowadays many novel chemicals are being synthesized termed as xenobiotics. The unique feature of these is what they are biodegradablenon- biodegradablepose on environmental threatthey are environment friendly
A rule of thumb for choosing indexes for a relational database includes which of the following?
Options: Indexes are more useful on smaller tables., Indexes are more useful for columns that do not appear frequently in the WHERE clause in queries., Do not specify a unique index for the primary key of each table., Be careful indexing attributes that have null values.