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Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Tests  >  Basic Electrical Technology  >  Test: Energy Stored in an Inductor - Electrical Engineering (EE) MCQ

Test: Energy Stored in an Inductor - Electrical Engineering (EE) MCQ


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10 Questions MCQ Test Basic Electrical Technology - Test: Energy Stored in an Inductor

Test: Energy Stored in an Inductor for Electrical Engineering (EE) 2024 is part of Basic Electrical Technology preparation. The Test: Energy Stored in an Inductor questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Energy Stored in an Inductor MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Energy Stored in an Inductor below.
Solutions of Test: Energy Stored in an Inductor questions in English are available as part of our Basic Electrical Technology for Electrical Engineering (EE) & Test: Energy Stored in an Inductor solutions in Hindi for Basic Electrical Technology course. Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free. Attempt Test: Energy Stored in an Inductor | 10 questions in 10 minutes | Mock test for Electrical Engineering (EE) preparation | Free important questions MCQ to study Basic Electrical Technology for Electrical Engineering (EE) Exam | Download free PDF with solutions
Test: Energy Stored in an Inductor - Question 1
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If the current in a coil having a constant inductance of L henrys grows at a uniform rate, what is the value of the average current?

Detailed Solution for Test: Energy Stored in an Inductor - Question 1

The average current is the average of the current which flows in the inductor. Hence it is I/2.

Test: Energy Stored in an Inductor - Question 2
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What is the power in the magnetic field if the current in a coil has a constant inductance of L henrys grows at a uniform rate?

Detailed Solution for Test: Energy Stored in an Inductor - Question 2

The average current is I/2. The e.m.f. induced in the coil is LI/t V. Power= VI, hence the average power= I/2*LI/t.

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Test: Energy Stored in an Inductor - Question 3
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 What is the energy stored in the magnetic field if the current in a coil has a constant inductance of L henrys grows at a uniform rate?

Detailed Solution for Test: Energy Stored in an Inductor - Question 3

The average current is I/2. The e.m.f. induced in the coil is LI/t V. Power= VI, hence the average power= I/2*LI/t. The total energy stored= power*t= LI2/2.

Test: Energy Stored in an Inductor - Question 4
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Find the average current in an inductor if the total current in the inductor is 26A.
Detailed Solution for Test: Energy Stored in an Inductor - Question 4

Average current= I/2.
Substituting the value of I from the equation, average current= 13A.

Test: Energy Stored in an Inductor - Question 5
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Calculate the emf induced in an inductor if the inductance is 10H and the current is 2A in 4s?
Detailed Solution for Test: Energy Stored in an Inductor - Question 5

The expression for emf in an inductive circuit is:
emf = LdI/dt
Substituting the values from the given question, we get emf = 5V.

Test: Energy Stored in an Inductor - Question 6
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 Calculate the value of stored energy in an inductor if the value of inductance is 20H and 4A of current flows through it.
Detailed Solution for Test: Energy Stored in an Inductor - Question 6

The expression for energy in an inductor is:
W= LI2/2t
Substituting the values from the given question, we get W= 160J.

Test: Energy Stored in an Inductor - Question 7
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Calculate the emf induced in an inductor if the inductance is 10H and the current is 2A in 4s.
Detailed Solution for Test: Energy Stored in an Inductor - Question 7

The expression for emf in an inductive circuit is:
emf= LI/2t
Substituting the values from the given question, we get emf= 2.5V.

Test: Energy Stored in an Inductor - Question 8
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 Calculate the value of emf in an inductor if the value of inductance is 15H and an average current of 5A flows through it in 10s.
Detailed Solution for Test: Energy Stored in an Inductor - Question 8

The expression for emf in an inductive circuit is:
emf= LI/2t, where I/2 is the average current.
Substituting the values from the given question, we get emf= 2.5V.

Test: Energy Stored in an Inductor - Question 9
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Calculate the current in an inductor if the energy stored is 160J and the inductance is 20H.
Detailed Solution for Test: Energy Stored in an Inductor - Question 9

The expression for energy in an inductor is:
W= LI2/2t
Substituting the values from the given question, we get I=4A.

Test: Energy Stored in an Inductor - Question 10
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Find the time taken for the current in an inductor to change to 2A from 0A if the power in the inductor is 5W. The value of inductance is 10H.
Detailed Solution for Test: Energy Stored in an Inductor - Question 10

The expression for power in an inductive circuit is:
P= LI2/2
Substituting the values from the given question, we get t=4s.

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