Test: Types of Inductor & Inductance

Test: Types of Inductor & Inductance

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10 Questions MCQ Test Basic Electrical Technology | Test: Types of Inductor & Inductance

Test: Types of Inductor & Inductance for Electrical Engineering (EE) 2022 is part of Basic Electrical Technology preparation. The Test: Types of Inductor & Inductance questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Types of Inductor & Inductance MCQs are made for Electrical Engineering (EE) 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Types of Inductor & Inductance below.
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Test: Types of Inductor & Inductance - Question 1

Among the following, which is the right formula for inductance?

Detailed Solution for Test: Types of Inductor & Inductance - Question 1

The average emf induced is proportional to the current per unit time, the constant of proportionality being L. Hence emf=LI/t. Making L the subject of the formula, we get: L=emf*t/I.

Test: Types of Inductor & Inductance - Question 2

Among the following, which is the right formula for inductance?

Detailed Solution for Test: Types of Inductor & Inductance - Question 2

The average emf induced in a coil= L=NΦ/t.

Test: Types of Inductor & Inductance - Question 3

The unit for inductance is ___________

Detailed Solution for Test: Types of Inductor & Inductance - Question 3

The unit of induction is named after a famous scientist Joseph Henry who independently discovered electromagnetic induction.

Test: Types of Inductor & Inductance - Question 4

What happens to the inductance when the magnetic field strength decreases?

Detailed Solution for Test: Types of Inductor & Inductance - Question 4

Inductance is directly proportional to the magnetic field strength in the coil, hence as the magnetic field strength increases, inductance decreases.

Test: Types of Inductor & Inductance - Question 5

As the number of turns in the coil increases, what happens to the inductance of the coil?

Detailed Solution for Test: Types of Inductor & Inductance - Question 5

Inductance is directly proportional to the square of the number of turns in the coil, hence as the number of turns increases, inductance also increases.

Test: Types of Inductor & Inductance - Question 6

What is the unit for inductive reactance?

Detailed Solution for Test: Types of Inductor & Inductance - Question 6

Inductive reactance is nothing but the impedance. Impedance is the AC equivalent of resistance, hence the unit for inductive reactance is ohm.

Test: Types of Inductor & Inductance - Question 7

What happens to the inductance as the length of the magnetic circuit increases?

Detailed Solution for Test: Types of Inductor & Inductance - Question 7

The formula for inductance is:
L=4*pi*10-7*A*N2/l, hence as the length of the magnetic circuit l increases, the inductance decreases.

Test: Types of Inductor & Inductance - Question 8

The types of inductors are ____________

Detailed Solution for Test: Types of Inductor & Inductance - Question 8

The two types of inductors are fixed and variable inductors. Fixed inductors are those whose inductance value cannot be changed. Variable inductors are those whose values can be changed as and when required.

Test: Types of Inductor & Inductance - Question 9

What happens to the inductance as the area of cross section of the coil increases?

Detailed Solution for Test: Types of Inductor & Inductance - Question 9

The formula for inductance is:
L=4*pi*10-7*A*N2/l, hence as the area of cross section A increases, the inductance also increases.

Test: Types of Inductor & Inductance - Question 10

When the coil is wrapped around a ferromagnetic core, why is it difficult to determine the inductance?

Detailed Solution for Test: Types of Inductor & Inductance - Question 10

When a coil is wrapped around a ferromagnetic core, it is difficult to determine the inductance because the variation of flux is no longer proportional to the variation of current.

Basic Electrical Technology

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