WorksheetsSELF-INDUCTION
Total questions: 11
Worksheet time: 12mins
A permanent magnet is quickly introduced into the center of an aluminum closed ring. With this ring ...
will be attracted to the magnet;
push away from the magnet;
remain stationary;
it will start to rotate about an axis passing through its center.
Determine the inductance of the coil if a 5 V self-induction EMF occurs at a rate of change of current of 10 A / s.
5 H
0,5 H
2 H
0,2 H
What is the greatest inductance core material out of the following?
Air
Copper
Iron
The symbol and units of inductors are
L (Henrys)
C (Conductance)
F (Flux)
C (Farads)
The effect on inductance by adding extra coil layers...
increase L
decrease L
An inductor ____.
All of the above
Provides a specific value of inductance
Opposes any change in current
Stores energy in a magnetic field
The coil has 500 turns. When the current is changed to 2 A, the magnetic flux through each turn changes by 4 mWb. Determine the inductance of the coil.
0.1H
1H
2H
0.2H
As the current decreases in the coil from 20 A to 10 A for 0.1 s, a self-induction of 200 V. occurs in it. What magnetic flux penetrates the coil at the instant when 15 A current flows through it?
30 Wb
25 Wb
450 Wb
20 Wb
A solenoid with a length of 20.0 cm has a total of 1260 turns of wire. If its cross-sectional area is 12.0 cm2 , the inductance of solenoid is
14 mH
16 mH
12 mH
18 mH
Inductor stores energy in the form of
electromagnetic field
electric field
magnetic field
