A closed lop of `B` is produced by a changing electric field l.Does it necessarily mean that `(dB)//(dt)` are non - zero at all the points on the loop and in the area enclosed by the loop?

A closed loop of B is produced by a changing electric field. Does it necessary mean that E and dE//dt are non-zero at all points on the loop and in the area enclosed by the loop?

Supose a gaussian surface does not include any net charge. Does it necessarily mean that E is equal to zero for all points on the surface?

If you find closed loops of B in a region in space, does it necessarily mean that actual charges are flowing across the area bounded by the loops?

A test charge q is made to move in the electric field of a point charge Q along two different closed paths. Fig. First path has sections along and perpendicular loop of the same area as the first loop. How does the work done compare in the two cases?

Work done to move a charge along a closed path inside an electric field is always zero. Use this fact to prove that it is impossible to produce an electric field in which all the lines of force would be parallel straight lines and the density of their distribution would constantly increase in a direction perpendicular to the lines of force as shown in Figure.​

Force on a charge in electric and magnetic fields A charge particle follows a parabolic path in a uniform electric field and a charged particel moving in a uniform magnetic field has two kinds of motions lnear motion in the direction of magnetic field and circular motion in a plane perpendicular to the magnetic field. when charge q is moving perpendicular to the magnetic field B, the radius of the circular path is r=(mv)/(Bq) . If v and B makes an angle theta , then r=(mvsintheta)/(Bq) , and the time period T=(2pim)/(Bq) . When a charged particle q is moving with velocity vecv in a magnetic field vecB , the force is non-zero. It means.

The vector sum of a system of non-collinear forces acting on a rigid body is gives to be non-zero. If the vector sum of all the torques due to the system of forces about a certain point is found to be zero, does this mean that it is necessarily zero about any arbitrary point?

Direction. In the follwing questions, a statement of assertion is followed by a statement of reason. While answering a question, you are required to choose the correct are out of the given four responses and mark it as (A). If both assertion and reason are true and reason is the correct explanation of the assertion, (B) if both assertion and reason are true but reason is not correct explanation of the assertion. (C) if asssertion is true, but reason if false, (D) if both assertion and reason are false Assertion : An e.m.f. is induced in a closed loop, where magnetic flux is varied. Reason : The line integral vecE. vec(dl) around the closed loop is non-zero.