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WorksheetsAET621 -Applications of Electrical Circuits -Inductors -Quiz 1
Total questions: 10
Worksheet time: 5mins
Inductors have the effect of storing current as an electromagnetic field whenever the current increases and:
storing voltage when the current decreases
giving it back when the current decreases
remaining constant when the current decreases
storing current as resistance when the current decreases
An EMF can be induced in a conductor if there is a relative movement between a conductor and:
a resistance
an inductor
the supply resistor
a magnetic field
Faraday’s Law of electromagnetic induction states that the value of the EMF induced in a circuit depends on the number of conductors in the circuit and the rate of change of the:
magnetic flux linking the conductors
electrostatic flux linking the conductors
voltage linking the conductors
magnetic current flowing through the air-gap
The following formula can be used to determine the voltage induced in a conductor by a moving magnetic field: In the formula, the ø stands for the:
change in magnetic voltage
magnetic flux in webers
time period for the magnetic change
number of conductors cut by the magnetic field
A coil of 400 turns is cut by a magnetic field of 0.15 Wb in 4 seconds. The voltage induced in the coil will be:
-25 V
-60 V
-15 V
-40 V
The inductive effect of Lenz’s law is such that the induced current will appear in such a direction that it:
is always in the same direction as the change that produced it
opposes the change that produced it
acts to assist the change that produced it
not induce a voltage in the conductor
Look at the diagram: The following diagram shows the symbol for a:
air-cored inductor
ferrite cored indictor
iron cored inductor
epoxy-resin cored inductor
The EMF generated in an inductor can be determined using the following formula: In the formula the L symbol stands for the:
length of the coil in meters
length of the conductors in meters
amount of time since the last induction
inductance of the coil in Henry
The term ‘self-inductance’ is used when a conductor has a voltage induced in it by:
its own magnetic field
a nearby magnetic field
its own electromotive force
a nearby electromotive force
Calculate the e.m.f. induced in a coil of inductance 12H by a current changing at the rate of 4A/s.
-12V
-24V
-36V
-48V
