The figure (a) shows a capacitor, with circular plates, that is being charged. P

Question

The figure (a) shows a capacitor, with circular plates, that is being charged. Point "a" (near one of the connecting wires) and point "b" (inside the capacitor gap) are equidistant from the central axis, as are point "c" (not so near the wire) and point "d" {between the plates but outside the gap). In figure (b), one curve gives the variation with distance r of the magnitude of the magnetic field inside and outside the gap. The two curves artially overlap.

1.) Which of the three points (1,2,3) on the curves correspond to point "a" of figure (a)?

2.) Which of the three points (1,2,3) on the curves correspond to point "b" of figure (a)?

3.) Which of the three points (1,2,3) on the curves correspond to point "c" of figure (a)?

4.) Which of the three points (1,2,3) on the curves correspond to point "d" of figure (a)?

Explanation / Answer

1) 1

2) 2

3) 3

4) 3

because, B = mue*I/(2*pi*r) (out side capacitor)

in side as r increases B increases up to end of the plates. after that again decreases.

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