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Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Tests  >  Basic Electrical Technology  >  Test: Magnitude of EMF Induced in a Coil - Electrical Engineering (EE) MCQ

Test: Magnitude of EMF Induced in a Coil - Electrical Engineering (EE) MCQ


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10 Questions MCQ Test Basic Electrical Technology - Test: Magnitude of EMF Induced in a Coil

Test: Magnitude of EMF Induced in a Coil for Electrical Engineering (EE) 2024 is part of Basic Electrical Technology preparation. The Test: Magnitude of EMF Induced in a Coil questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Magnitude of EMF Induced in a Coil MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Magnitude of EMF Induced in a Coil below.
Solutions of Test: Magnitude of EMF Induced in a Coil questions in English are available as part of our Basic Electrical Technology for Electrical Engineering (EE) & Test: Magnitude of EMF Induced in a Coil 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: Magnitude of EMF Induced in a Coil | 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: Magnitude of EMF Induced in a Coil - Question 1
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The formula for induced emf is ______

Detailed Solution for Test: Magnitude of EMF Induced in a Coil - Question 1

The formula for induced emf is: emf=Blv, where B is the magnetic field, l is the length of the conductor and v is the velocity with which it is moving in the magnetic field.

Test: Magnitude of EMF Induced in a Coil - Question 2
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Which, among the following, is the formula for induced emf?

Detailed Solution for Test: Magnitude of EMF Induced in a Coil - Question 2

The formula foe induced emf is e=d(phi)/dt because the induced emf is the flux linkage per unit time.

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Test: Magnitude of EMF Induced in a Coil - Question 3
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Find the length of a conductor which is moving with a velocity 0.4m/s in a magnetic field of 8T, inducing an emf of 20V.

Detailed Solution for Test: Magnitude of EMF Induced in a Coil - Question 3

The formula for induced emf is: emf=Blv. Substituting the values of B, emf and v from the question, we get l=6.25m.

Test: Magnitude of EMF Induced in a Coil - Question 4
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If a conductor 0.2m long moves with a velocity of 0.3m/s in a magnetic field of 5T, calculate the emf induced.
Detailed Solution for Test: Magnitude of EMF Induced in a Coil - Question 4

The formula for induced emf is: emf=Blv. Substituting the values of B, l and v from the question, we get emf=0.3V.

Test: Magnitude of EMF Induced in a Coil - Question 5
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 What is emf?
Detailed Solution for Test: Magnitude of EMF Induced in a Coil - Question 5

Electromotive force is not actually a force. It is basically a voltage. It is the voltage developed by any source of electrical energy.

Test: Magnitude of EMF Induced in a Coil - Question 6
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Find the strength of magnetic field in a conductor 0.5m long moving with a velocity of 10m/s, inducing an emf of 20V.
Detailed Solution for Test: Magnitude of EMF Induced in a Coil - Question 6

The formula for induced emf is: emf=Blv. Substituting the values of l, emf and v from the question, we get B=4T.

Test: Magnitude of EMF Induced in a Coil - Question 7
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The emf induced in a coil having N turns is?
Detailed Solution for Test: Magnitude of EMF Induced in a Coil - Question 7

The emf induced in a coil having N turns is, e=N*phi/t. This is because, the emf in a single coil is the flux linkage per unit time, that is, phi/t. Hence the flux induced in N turns is N*phi/t.

Test: Magnitude of EMF Induced in a Coil - Question 8
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 An E.M.F. can be induced by _______
Detailed Solution for Test: Magnitude of EMF Induced in a Coil - Question 8

The dot product of magnetic field vector and area vector.
emf=BAcos(theta), hence if either of the three, that is, magnetic field, area or angle changes, thee emf will change.

Test: Magnitude of EMF Induced in a Coil - Question 9
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What is the consequence of motor effect?
Detailed Solution for Test: Magnitude of EMF Induced in a Coil - Question 9

Motor effect is when a current carrying conductor in a magnetic field experiences a force, hence its consequence is electromagnetic induction.

Test: Magnitude of EMF Induced in a Coil - Question 10
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The total number of magnetic field lines passing through an area is termed as _______
Detailed Solution for Test: Magnitude of EMF Induced in a Coil - Question 10

The number of magnetic flux lines per unit area is the magnetic flux, because flux is the number of field lines per unit area.

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