ELECTROMAGNETIC FIELD THEORY QUIZ

Radiation intensity in a given direction is the

Power radiated per unit solid angle in that direction

Energy radiated per square metre

None of these

Power radiated per square metre

TRUE ANSWER : ?
YOUR ANSWER : ?

________ at a point is defined as the force experienced per unit positive charge at a point placed in the electric field.

Magnetic flux density.

None of these

Electric intensity.

Electric flux.

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YOUR ANSWER : ?

Electric field inside a hollow metallic charged sphere is

zero.

none of above.

decreasing towards centre.

increasing towards centre.

TRUE ANSWER : ?
YOUR ANSWER : ?

Gradient of scalar field is expressed as

Maximum rate of increase of scalar function at a point.

Gradient of divergence of a vector field minus the curl of the vector field.

Outward flux of a vector field per unit volume as the volume about the point tends to zero.

Circulation of a vector field per unit area as the area tends to zero.

TRUE ANSWER : ?
YOUR ANSWER : ?

Coulombs law for the force between electric charges most closely resembles with

Newtons law of gravitation.

Law of conservation of energy.

Gauss theorem.

Newtons law of motion.

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YOUR ANSWER : ?

The magnetic vector potential due to a single conductor carrying current is

finite.

infinite.

zero.

none of tha above.

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YOUR ANSWER : ?

Which of the following is multiband HF receiving antenna?

Conical horn

Log-periodic

Square loop

Folded dipole

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Two identical circular coils, one closed and another is little split (not enclosed) are placed in an uniform magnetic field which decrease at a constant rate. If the plane to the coils are perpendicular to the field which of the following statements is true?

An emf is induced in both coils.

An emf is induced in split coil.

Equal joule heating occurs in both coils.

Joule heating does not occur in each of the coils.

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YOUR ANSWER : ?

An infinite non conducting sheet of charge has σ of 10-7 c/m3. Equipotential surface for a potential of 10 volts is.

1.32 mm.

0.

1.77 mm.

0.88 mm.

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YOUR ANSWER : ?

In frec space E (z,t) = 103 sin(ωt - βz) uy v/m. What is the value of H (z,t)

(103/377) sin(ωt - β z)(-uy) A/m.

(103/377) sin(ωt - β z)(-ux) A/m.

None of above.

(103/377) cos(ωt - β z)(-ux) A/m.

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