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Electronics - Inductors

Exercise : Inductors - General Questions
86.
A voltage is induced in a transformer secondary winding by the action of the:
secondary magnetic field
primary turns ratio
primary magnetic field
secondary counter emf
Answer: Option
Explanation:
No answer description is available. Let's discuss.
87.
What is electromagnetism?
the magnetic field generated around a conductor when a current passes through it
the magnetic field generated in a conductor by an external voltage
the voltage caused by a magnetic field in a conductor
the current generated by an external magnetic field
Answer: Option
Explanation:
No answer description is available. Let's discuss.
88.
Counter emf or induced voltage is:
inversely proportional to the change in current
directly proportional to the change in time
directly proportional to the inductance in henrys
inversely proportional to the inductance in henrys
Answer: Option
Explanation:
No answer description is available. Let's discuss.
89.
What are the properties that determine the inductance of a coil?
Length of wire, number of turns, type of core material, length of core
Number of turns, type of wire, length of core, and cross-sectional area of core
Type of core material, number of turns, cross-sectional area of core, and length of core
Type of core material, type of wire, number of turns, and cross-sectional area of core
Answer: Option
Explanation:
No answer description is available. Let's discuss.
90.
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
a short
an open
a resistor
a voltage source
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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