Explore topic-wise MCQs in Engineering.

Since diodes are destroyed by excessive current, circuits must have:

When matching polarity connections have been made and the potential difference (PD) is above 0.7 V, the diode is considered to be:

In a power supply diagram, which block indicates a smooth dc output?

In a diode schematic, the anode is represented by a(n):

An IC regulator receives an overload; it will:

An ideal operational amplifier has

Another name for a unity gain amplifier is:

The open-loop voltage gain (A_ol) of an op-amp is the

What is the output waveform?

A series dissipative regulator is an example of a:

Which type of transformer is required to create a 180 degree input to a rectifier?

What circuit activity may shift a characteristic curve so that diode operating points are different?

What is wrong with this diode?

The dc current through each diode in a bridge rectifier equals:

When a load is not connected to the secondary of a transformer:

What is the total inductance assuming no mutual inductance?

A voltage is induced in a transformer secondary winding by the action of the:

What is electromagnetism?

Counter emf or induced voltage is:

What are the properties that determine the inductance of a coil?

The time required for one weber of flux to cut a conductor and produce one volt is:

An inductor is in series with a voltage source, an open switch, and a resistor. The instant the switch is closed, the inductor acts like

What is the phase angle between the source voltage and current, when a 100 mH inductor with a reactance of 6 k, and a 1 k resistor are in series with a source?

A practical inductor

Fixed transformers have:

In a B-H curve, magnetizing force is equal to:

Which of the following represents a true equivalent of an inductor?

What is the maximum source current for a transformer rated at 10 kVA, 1000/500 60 Hz?

The unit of flux density is:

When used as a filter, an inductor is

A loaded transformer will achieve mutual induction when:

Which transformer turns ratio is needed to match two 16-ohm parallel devices to an output of 22.2 ohms?

A transformer will have:

What is the phase angle of a 24 V_ac parallel RL circuit when R = 45 ohms and X_L = 1100 ohms?

A winding of wire can be called

A value of "ten to the eighth power magnetic lines of force" is for the term:

A change of one ampere per second in an inductor that induces a voltage of one volt is considered as which unit value?

What is the name of the part inside a relay that is moved by the action of the electromagnet?

The polarity of induced voltage while a field is collapsing is:

What is the permeability of transformer iron?

What is the current rise after 2 time constants if V_s = 12 V dc, R = 60 , and the inductor is rated at 24 mH?

What is the total inductance of a 5 H and a 100 mH coil connected in parallel?

A transformer is used:

Which of the following is NOT one of the three major types of fixed inductor?

What is the impedance of a 1 kHz series RL circuit when R and X_L are both 1000 ohms?

What is remanence?

When an electromagnet reaches maximum strength, it is considered to be:

If you wanted to decrease the inductance of a coil, you might increase the:

The output phase for a transformer is:

Opposition to current flow without the dissipation of energy is called: