Q1) Consider the diagram at the shown. A magnetic field, B , points downwards on

Question

Q1) Consider the diagram at the shown. A magnetic field, B, points downwards on the page. A positive charge, +q, moves to the right through the field. What is the direction of the force on the charge due to the magnetic field?

The answer is not d. Please give a full explanation for your answer.

Q2)

Three plastic balls are suspended from insulating threads. Several experiments are performed on the balls to determine the charge on them; and the following observations are made:

I) Ball A attracts Ball B.

II) Ball A and Ball B attract Ball C.

III) A positively charged rod attracts B.

Which choice of charge configurations (a through e) correctly identifies the charges on each ball? The answer is not b. Please give full explanation for your answer.

Consider the diagram at the shown. A magnetic field, B, points downwards on the page. A positive charge, +q, moves to the right through the field. What is the direction of the force on the charge due to the magnetic field?

Explanation / Answer

it will be (e)

F=qV X B cross product as well as right hand thumb rule will give the direction of force into the plane of board.

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