An ohmmeter is connected across an inductor and the pointer indicates zero ohms. The inductor is
Select an option to see the answer and solution.
Electrical Engineering · all questionsElectrical Inductors
Electrical Inductors
practice.
Practice every MCQ with options. Use Show answers when you want the correct option and solution.
33
Questions
2/2
Page
Pick an option on a question to see the right answer and solution.
When the current through an inductor decreases, the amount of energy stored in the electromagnetic field
Select an option to see the answer and solution.
When the current through an inductor is cut in half, the amount of energy stored in the electromagnetic field
Select an option to see the answer and solution.
The following coils are in parallel: 75 µH, 40 µH, 25 µH, and 15 µH. The total inductance is approximately
Select an option to see the answer and solution.
Inductors add in parallel.
Select an option to see the answer and solution.
A 320 µH coil is in series with a 3.3 kΩ resistor. How long does it take for current to build up to its full value?
Select an option to see the answer and solution.
A 240 µH inductor is equivalent to a
Select an option to see the answer and solution.
The inductance of an iron-core coil decreases if
Select an option to see the answer and solution.
The permeability of a core material is an indication of the ability of the material to establish a magnetic field.
Select an option to see the answer and solution.
Two inductors, L1 and L2, are in parallel. L1 has a value of 25 µH and L2 a value of 50 µH. The parallel combination is in series with L3, a 20 µH coil. The entire combination is across an ac source of 60 Vrms at 300 kHz. The total rms current is
Select an option to see the answer and solution.
An induced voltage is produced as a result of a dc voltage.
Select an option to see the answer and solution.
Inductance is the property of an inductor that produces an opposition to any change in current.
Select an option to see the answer and solution.
An inductor and a resistor are in series with a sine wave voltage source. The frequency is set so that the inductive reactance is equal to the resistance. If the frequency is increased, then
Select an option to see the answer and solution.