More on electromagnetics

The value of x which makes xi+2j+8k and 2i+3j-k

perpendicular is

• 0

• -1

• 1

• 2

If electric field intensity at a point is zero, then potential at that point is

• infinite

• constant

• 10

• 0

Force on a current loop placed in a magnetic field is

• 0

• maxm

• minm

• infinite

Ampere's circuital law is valid for

• varying current

• static current

• alternating current

• harmonic field

Electromagnetic field can be produced by

• static charges

• static magnetic dipoles

• accelerated charges

• charges moving with constant velocity

A particle moves in the force field given by

F=2xz(1-6xyz)i + (1-6xyz)2xz j+ (1-6xyz)2xy k; Can you define a potential function for this field?

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For an electric potential V = (x2+y2+z2), electric field at (2,1,1) is

• 6

• 4

• 2

• 8

Which relation will show static magnetic field is non conservative

• line integral B.dl=0

• div.B=0

• curl of B=0

• curl of B= constant

B= λ (xi+yj), where λ is a constant

• is not consistent with Maxwell's EM field equation

• is consistent with Maxwell's EM field equation

• is not consistent with Biot Savart law

• is consistent with Biot Savart law

What is the way of converting Maxwell's first equation into Coulomb's law

• take integral

• take div

• take curl

• apply guss's div theorem