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Maxwell's Equation MCQ Level - 2 - IIT JAM MCQ


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10 Questions MCQ Test - Maxwell's Equation MCQ Level - 2

Maxwell's Equation MCQ Level - 2 for IIT JAM 2024 is part of IIT JAM preparation. The Maxwell's Equation MCQ Level - 2 questions and answers have been prepared according to the IIT JAM exam syllabus.The Maxwell's Equation MCQ Level - 2 MCQs are made for IIT JAM 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Maxwell's Equation MCQ Level - 2 below.
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Maxwell's Equation MCQ Level - 2 - Question 1

A parallel plate capacitor is being discharged. What is the direction of the energy flow in terms of the Poynting vector in the space between the plates?

Detailed Solution for Maxwell's Equation MCQ Level - 2 - Question 1

As the capacitor is being discharged, field is decreasing

Using expression for curl in cylindrical coordinates, we get


Since there is φ symmetry

Thus, magnetic field in  direction will be induced, since,
∴ Direction of poynting vector 

 radially outward

The correct answer is: Radially outward 

Maxwell's Equation MCQ Level - 2 - Question 2

Magnetic field in a region is  the induced electric field due to this time varying magnetic field is

Detailed Solution for Maxwell's Equation MCQ Level - 2 - Question 2

The induced electric field lines are concentric circles with clockwise direction.
Physical argument for the direction is that if we put a conducting loop in the magnetic field current will flow in clockwise direction.
∴  Along a circle of radius r, we get

Here  means  is in each a direction to oppose change in flux.
The correct answer is:  

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Maxwell's Equation MCQ Level - 2 - Question 3

Consider a capacitor placed in free space, consisting of two concentric circular parallel plate of radii r. The separation  between the plates. The capacitor is connected to an oscillating voltage source of voltage  v(t) = V0 sin(ωt). The magnetic field vector between the plate at a distance r/2 from the axis of the capacitor.

Detailed Solution for Maxwell's Equation MCQ Level - 2 - Question 3


Let us take a loop of radius x with centre on the axis 
Current enclosed

Applying Maxwell’s equation

The correct answer is: 

Maxwell's Equation MCQ Level - 2 - Question 4

Consider the following


where E = electric field and B = magnetic field. Which of the above equations predict(s) the electric field E to be zero?

Detailed Solution for Maxwell's Equation MCQ Level - 2 - Question 4


Electric flux is zero. It may happen for E ⊥ ds.

Potential difference is zero.
E is not necessarily zero.


⇒ E is produced, if magnetic flux changes with time. Thus, no equation gives E as zero.

The correct answer is: None of these

Maxwell's Equation MCQ Level - 2 - Question 5

The magnetic field associated with the electric field vector  is given by

Detailed Solution for Maxwell's Equation MCQ Level - 2 - Question 5

Let us use the equation



 (After integration)

The correct answer is:  

Maxwell's Equation MCQ Level - 2 - Question 6

Differential form of Gauss’s law in magnetostatics is _____________ 

Detailed Solution for Maxwell's Equation MCQ Level - 2 - Question 6

Gauss’s law in magnetostatics states that the surface integration of magnetic fields over a closed surface is zero. Its differential form is: div B = 0.

Maxwell's Equation MCQ Level - 2 - Question 7

Detailed Solution for Maxwell's Equation MCQ Level - 2 - Question 7

Maxwell's Equation MCQ Level - 2 - Question 8

An electromagnetic wave travels along z-axis. Which of the following pair of space and time varying fields would generate such a wave?

Detailed Solution for Maxwell's Equation MCQ Level - 2 - Question 8

Ex and By would generate a plane electromagnetic wave travelling in z-direction. E, B and k form a right handed system where k is along z-axis. (As, i x j = k) ∴ E is along x-axis and B is along y-axis

Maxwell's Equation MCQ Level - 2 - Question 9

LASER are light source which give almost perfectly parallel beam of high intensity. If a 2kW laser beam is concentrated by a lens into cross-sectional area about 10–6 cm2, then the value of Poynting vector

Detailed Solution for Maxwell's Equation MCQ Level - 2 - Question 9

Power = 2 kW = 2 × 103 W
Cross-sectional area = 106 cm2
Poynting vector S = P/A

The correct answer is: 2 × 1013 W/m2

Maxwell's Equation MCQ Level - 2 - Question 10

Which of the following is the expression for Lorentz force?

Detailed Solution for Maxwell's Equation MCQ Level - 2 - Question 10

Lorentz force is the force on a particle when it moves through a medium where both magnetic and electric fields are present.

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