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Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Tests  >  Test: Magnitude of The Generated or Induced EMF - Electrical Engineering (EE) MCQ

Test: Magnitude of The Generated or Induced EMF - Electrical Engineering (EE) MCQ


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10 Questions MCQ Test - Test: Magnitude of The Generated or Induced EMF

Test: Magnitude of The Generated or Induced EMF for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Test: Magnitude of The Generated or Induced EMF questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Magnitude of The Generated or Induced EMF 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 The Generated or Induced EMF below.
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Test: Magnitude of The Generated or Induced EMF - Question 1
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 Which, among the following, is the formula for induced emf?

Detailed Solution for Test: Magnitude of The Generated or Induced EMF - Question 1

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

Test: Magnitude of The Generated or Induced EMF - Question 2
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The formula for induced emf is _______

Detailed Solution for Test: Magnitude of The Generated or Induced EMF - Question 2

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.

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Test: Magnitude of The Generated or Induced EMF - Question 3
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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 The Generated or Induced EMF - Question 3

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 The Generated or Induced EMF - Question 4
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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 The Generated or Induced EMF - Question 4

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 The Generated or Induced EMF - Question 5
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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 The Generated or Induced EMF - Question 5

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 The Generated or Induced EMF - Question 6
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What is emf?
Detailed Solution for Test: Magnitude of The Generated or Induced EMF - Question 6

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 The Generated or Induced EMF - Question 7
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An E.M.F. can be induced by _________
Detailed Solution for Test: Magnitude of The Generated or Induced EMF - Question 7

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 The Generated or Induced EMF - Question 8
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 The emf induced in a coil having N turns is?
Detailed Solution for Test: Magnitude of The Generated or Induced EMF - Question 8

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 The Generated or Induced EMF - Question 9
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The total number of magnetic field lines passing through an area is termed as ________
Detailed Solution for Test: Magnitude of The Generated or Induced EMF - Question 9

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

Test: Magnitude of The Generated or Induced EMF - Question 10
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What is the consequence of motor effect?
Detailed Solution for Test: Magnitude of The Generated or Induced EMF - Question 10

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

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