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Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Tests  >  Electromagnetic Fields Theory (EMFT)  >  Test: Maxwell Law in Time Static Fields - Electrical Engineering (EE) MCQ

Test: Maxwell Law in Time Static Fields - Electrical Engineering (EE) MCQ


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10 Questions MCQ Test Electromagnetic Fields Theory (EMFT) - Test: Maxwell Law in Time Static Fields

Test: Maxwell Law in Time Static Fields for Electrical Engineering (EE) 2024 is part of Electromagnetic Fields Theory (EMFT) preparation. The Test: Maxwell Law in Time Static Fields questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Maxwell Law in Time Static Fields MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Maxwell Law in Time Static Fields below.
Solutions of Test: Maxwell Law in Time Static Fields questions in English are available as part of our Electromagnetic Fields Theory (EMFT) for Electrical Engineering (EE) & Test: Maxwell Law in Time Static Fields solutions in Hindi for Electromagnetic Fields Theory (EMFT) course. Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free. Attempt Test: Maxwell Law in Time Static Fields | 10 questions in 10 minutes | Mock test for Electrical Engineering (EE) preparation | Free important questions MCQ to study Electromagnetic Fields Theory (EMFT) for Electrical Engineering (EE) Exam | Download free PDF with solutions
Test: Maxwell Law in Time Static Fields - Question 1
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Calculate the emf in a material with flux linkage of 3.5t2 at 2 seconds. 

Detailed Solution for Test: Maxwell Law in Time Static Fields - Question 1

Answer: c
Explanation: The emf induced in a material with flux linkage is given by Vemf = -dλ/dt. On substituting λ= 3.5t2, we get emf = -7t. At time t = 2sec, the emf will be -14 units.

Test: Maxwell Law in Time Static Fields - Question 2
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Find the emf induced in a coil of 60 turns with a flux rate of 3 units.

Detailed Solution for Test: Maxwell Law in Time Static Fields - Question 2

Answer: b
Explanation: The emf induced is the product of the turns and the flux rate. Thus Vemf = -Ndφ/dt. On substituting N = 60 and dφ/dt = 3, we get emf as -60 x 3 = -180 units.

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Test: Maxwell Law in Time Static Fields - Question 3
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Find the electric field intensity of a charge 2.5C with a force of 3N.

Detailed Solution for Test: Maxwell Law in Time Static Fields - Question 3

Answer: d
Explanation: The electric field intensity is the electric force per unit charge. It is given by E = F/q. On substituting F = 2.5 and q = 3, we get E = 3/2.5 units.

Test: Maxwell Law in Time Static Fields - Question 4
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The electric field intensity of a field with velocity 10m/s and flux density of 2.8 units is
Detailed Solution for Test: Maxwell Law in Time Static Fields - Question 4

Answer: b
Explanation: The electric field is the product of the velocity and the magnetic flux density given by E = v x B. On substituting v = 10 and B = 2.8, we get E = 10 x 2.8 = 28 units.

Test: Maxwell Law in Time Static Fields - Question 5
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The line integral of the electric field intensity is
Detailed Solution for Test: Maxwell Law in Time Static Fields - Question 5

Answer: b
Explanation: From the Maxwell first law, the transformer emf is given by the line integral of the electric field intensity. Thus the emf is given by ∫ E.dl.

Test: Maxwell Law in Time Static Fields - Question 6
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Which of the following relations is correct?
Detailed Solution for Test: Maxwell Law in Time Static Fields - Question 6

Answer: c
Explanation: The emf induced in a material is given by the line integral of the electric field intensity. Thus EMF = ∫ E.dl is the correct relation.

Test: Maxwell Law in Time Static Fields - Question 7
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For static fields, the curl of E will be
Detailed Solution for Test: Maxwell Law in Time Static Fields - Question 7

Answer: b
Explanation: For static fields, the charges will be constant and the field is constant. Thus curl of the electric field intensity will be zero. This implies the field is irrotational.

Test: Maxwell Law in Time Static Fields - Question 8
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The line integral of which parameter is zero for static fields?
Detailed Solution for Test: Maxwell Law in Time Static Fields - Question 8

Answer: a
Explanation: The field is irrotational for static fields. Thus curl of E is zero. From Stokes theorem, the line integral of E is same as the surface integral of the curl of E. Since it is zero, the line integral of E will also be zero.

Test: Maxwell Law in Time Static Fields - Question 9
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The magnitude of the conduction current density for a magnetic field intensity of a vector yi + zj + xk will be
Detailed Solution for Test: Maxwell Law in Time Static Fields - Question 9

Answer: b
Explanation: From the Ampere circuital law, the curl of H is the conduction current density. The curl of H = yi + zj + xk is –i – j – k. Thus conduction current density is –i – j – k. The magnitude will be √(1 + 1 + 1) = √3 = 1.732 units.

Test: Maxwell Law in Time Static Fields - Question 10
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If the conductor is stationary and the field is changing (varying), then emf induced in it. Such an emf is known as:
Detailed Solution for Test: Maxwell Law in Time Static Fields - Question 10

Dynamically induced EMF: When the conductor is rotating and the field is stationary, then the emf induced in the conductor is called dynamically induced EMF.

Ex: DC Generator, AC generator

Static induced EMF: When the conductor is stationary and the field is changing (varying) then the emf induced in the conductor is called static induced EMF.

Ex: Transformer

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