Achiever Study Plan ESE-2018: Electromagnetic Field Theory Quiz 1

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Question 1

The potential at the centroid of an equilateral triangle of side due to three equal positive point charges each of value q and placed at the vertices of the triangle would be

• A
• B
• C
• Dzero

Question 2

The characteristic impedance η₀ of a free space is

• A
• B
• C
• D

Question 3

Which among the following statements are incorrect?

• AEnergetic electrons carry an electric charge and interact with electrons in the absorber material through the Coulomb force.
• BThe force is a repulsive which result in as seen for heavy charged particles.
• CThe fast electron experiences cumulative effect of simultaneous Coulomb forces.
• DThe distance traveled by fast electron is lesser for initial energy

Question 4

In a paired solenoid shown, what will happen when the switch is closed?

• ACurrent will flow in all the coils
• BFlux will vary
• CCurrent flows in one coil
• DNone of these

Question 5

An electrostatic force between two-point charges increases when they are:

• AMore apart and dielectric constant of the medium between them decreases
• BLess apart and dielectric constant of the medium between them decreases
• CMore apart and dielectric constant of the medium between them increases
• DLess apart and dielectric constant of the medium between them increases

Question 6

What is the value of work required to move a + 8nC charge from infinity to a point P which is at 2m distance from a point charge Q = +5μC?

• A180μJ
• B180nJ
• C18μJ
• D18nJ

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