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Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Tests  >  Basic Electrical Technology  >  Test: Magnetic Field of a Solenoid - Electrical Engineering (EE) MCQ

Test: Magnetic Field of a Solenoid - Electrical Engineering (EE) MCQ


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10 Questions MCQ Test Basic Electrical Technology - Test: Magnetic Field of a Solenoid

Test: Magnetic Field of a Solenoid for Electrical Engineering (EE) 2024 is part of Basic Electrical Technology preparation. The Test: Magnetic Field of a Solenoid questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Magnetic Field of a Solenoid MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Magnetic Field of a Solenoid below.
Solutions of Test: Magnetic Field of a Solenoid questions in English are available as part of our Basic Electrical Technology for Electrical Engineering (EE) & Test: Magnetic Field of a Solenoid 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: Magnetic Field of a Solenoid | 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: Magnetic Field of a Solenoid - Question 1
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The magnetic field strength of a solenoid can be increased by inserting which of the following materials as the core?

Detailed Solution for Test: Magnetic Field of a Solenoid - Question 1

The Magnetic field of a solenoid increases when we insert a iron core because, iron is a ferromagnetic material and ferromagnetic materials help in increasing the magnetic property.

Test: Magnetic Field of a Solenoid - Question 2
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If a coil is wound around a steel core and electric current is passed through the coil, the steel core acts as a?

Detailed Solution for Test: Magnetic Field of a Solenoid - Question 2

When a coin is wound around a steel core, the steel core behaves as a permanent magnet because it is a ferromagnetic material and once it becomes magnetic it does not lose its magnetic property.

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Test: Magnetic Field of a Solenoid - Question 3
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What is the formula for magnetic field due to a solenoid?

Detailed Solution for Test: Magnetic Field of a Solenoid - Question 3

The magnetic field due to a solenoid is:
B= μnI, where μ is the permeability, n is the number of turns per unit length and I is the current in the solenoid.

Test: Magnetic Field of a Solenoid - Question 4
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What happens to the magnetic field in the solenoid when the number of turns increases?
Detailed Solution for Test: Magnetic Field of a Solenoid - Question 4

The magnetic field of a solenoid is directly proportional to the number of turns in it. Hence as the number of turns increases, the magnetic field also increases.

Test: Magnetic Field of a Solenoid - Question 5
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What happens to the magnetic field in the solenoid when the current increases?
Detailed Solution for Test: Magnetic Field of a Solenoid - Question 5

The magnetic field of a solenoid is directly proportional to the current in it. Hence as the current increases, the magnetic field also increases.

Test: Magnetic Field of a Solenoid - Question 6
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What happens to the magnetic field in the solenoid when the length of the solenoid increases?
Detailed Solution for Test: Magnetic Field of a Solenoid - Question 6

The magnetic field of a solenoid is inversely proportional to the length. Hence as the length increases, the magnetic field decreases.

Test: Magnetic Field of a Solenoid - Question 7
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 What is the magnetic field outside a solenoid?
Detailed Solution for Test: Magnetic Field of a Solenoid - Question 7

There are no magnetic lines of force outside a solenoid, hence the magnetic field outside a solenoid is zero.

Test: Magnetic Field of a Solenoid - Question 8
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The current in a solenoid is 30A, the number of turns per unit length is 500 turns per metre. Calculate the magnetic field if the core is air.
Detailed Solution for Test: Magnetic Field of a Solenoid - Question 8

The magnetic field in a solenoid is given by:
B=μnI
Substituting the values in the given values in the equation, B=18.84mT.

Test: Magnetic Field of a Solenoid - Question 9
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The magnetic field of the solenoid is 18.84mT, the number of turns per unit length is 500 turns per metre. Calculate the current if the core is air.
Detailed Solution for Test: Magnetic Field of a Solenoid - Question 9

 The magnetic field in a solenoid is given by:
B=μnI
Substituting the values in the given values in the equation, I=30A.

Test: Magnetic Field of a Solenoid - Question 10
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The magnetic field of the solenoid is 18.84mT, the current is 30A. Calculate the number of turns per unit length if the core is air.
Detailed Solution for Test: Magnetic Field of a Solenoid - Question 10

The magnetic field in a solenoid is given by:
B=μnI
Substituting the values in the given values in the equation n=500 turns/m.

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