Question

Choose the true statement or statements below about a magnetic field. If more than one choice is correct, you must indicate all. A magnetic field Part A is non-conservative. that is constant can induce an emf in a conducting loop in the vicinity. inside a charging parallel plate capacitor varies with distance from the center in the same way as the magnetic field inside a current-carrying cylinder. always exerts a force parallel to the direction of motion of a charge. can be created only by accelerating a positive charge. → is conservative because $ B. dA = 0.

Answer 1

1)Magnetic field are generally conservative in nature. It can be compared with electric charge. But there are times in which magnetic field acts as non conservative when there is change in electric field.

2) A change in magnetic field induces emf as stated by Faraday s law. Hence the statement is false.

3) inside a capacitor only electric field is present and only that is responsible to storage of charge not the magnetic field hence the statement is false.

4)Force due magnetic field is given by F=B.q.v sin(theta) Where theta is the angle between velocity and magnetic field. Hence fields should be perpendicular to obtaine maximum force. Hence the statement is again false.

5 magnetic field always flow from positive to negative polarity of magnetic hence we need a dipole.

So by accelerated charge can create magnetic field but it is not the only way to create magnetic field hence the statement is false.

6) Magnetic field is given by the formula as mentioned and is a true formula as it states that magnetic field is conservative.

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