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1765.

The image of the dipole of moment P in the grounded sphere shown in the given figure is

a. A dipole of moment P
b. A dipole of moment PR/d
c. A dipole of moment PR²/d²
d. Not a dipole

asked in Electrical Paper-1, 1997

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1766.

An infinitely long conductor carrying a current I in a region permeability μ₁ and in the vicinity of another region of permeability µ₂ is shown in the given figure for calculating the field in the first region, the effect of discontinuity is replaced by an image I’ and with μ₁ < μ₂.
which one of the following statements is correct in this regard?

a. I and I’ have the same strength and direction
b. I and I’ have opposite direction but the same strength
c. 1 and I’ have the same direction but different strength
d. I and I’ have opposite direction and different strength

asked in Electrical Paper-1, 1997

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1767.

A magnetic field B and an electric field E are at right angles to each other along the y-axis and x - axis respectively as shown in the given figure. the path of an electron which starts at the origin will be

a. Straight along the y-axis
b. Cycloidal along the x-axis
c. Straight along the z-axis
d. Cycloidal along the z-axis

asked in Electrical Paper-1, 1997

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1768.

An infinite plane surface carries a uniform charge density p/m² as shown in the figure.The electric field E at any point Z is given by

asked in Electrical Paper-1, 1997

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1769.

Two concentric metallic spheres of radii ‘a' and ‘b’ carry charges + Q and – Q respectively as shown in the given figure. Potential at the centre ‘P will be

a. Zero
b. Q/4πε_ob
c. -Q/4πε_oa
d. Q/4πε_o (1/b - 1/a)

asked in Electrical Paper-1, 1997

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1770.

A charge distribution is shown in the given figure:

Which of the following expressions for the displacement flux density D due to the given charge distribution is correct?

Select the correct answer using the codes given below:
a. 1 and 4
b. 2 and 3
c. 1,2 and 3
d. 2,3 and 4

asked in Electrical Paper-1, 1997

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