JEE Advanced · 2006 · 09 Apr 2006 · Electrostatics

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In the given diagram, a line of force of a particular force field is shown. Out of the following options, it can never represent

(A)an electrostatic field✓ Correct
(B)a magnetostatic field
(C)a gravitational field of a mass at rest✓ Correct
(D)an induced electric field

Answer: (A), (C)

Solution

Lines of force in electrostatic and gravitational fields (for masses at rest) must originate from charges or masses and cannot form closed loops. The diagram shows a closed loop, which is characteristic of magnetostatic fields (around current-carrying conductors) or induced electric fields (from changing magnetic flux). Therefore, the line of force shown can never represent an electrostatic field or a gravitational field of a mass at rest.

JEE Advanced · 2006 · 09 Apr 2006 · One or more correct options

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