Question 1 Up Down In the figure provide, a rectan lar loop of copper wire is ha

Question

Question 1 Up Down In the figure provide, a rectan lar loop of copper wire is half in and half aut a magnetic field. ?fthe loop is released and begins to all, what direction is the net magnetic force on the loop? Note that the magnetic field belawthe dashed line is zero There is no net magnetic force on the loop Upward Question 2 In the figure provided, a magnetic feld?increasing. what?the dre tion of the current in the loop af wire? Cockwise There is no current in the loop of the wire Question 3 In the figure provided, a bar magnet is pushed upwards toward a conducting loap. Is there are force between the loap and the magnet, and If so, is it attractive ar repulsive? (Hint: a current-carryling loap of wire acts as a magnetic dipole.) O There is a repulsive force O There is an atbractive force. There is no magnetic force Question 4 An LC arait asollates at a frequency of 2.00x103 ?. What will the frequency be if the inductance halved? 0 1.41x103 Hz 0 1.00x103 Hz o 4.00x103 Hz 2.83x103 H

Explanation / Answer

1.) Using Fleming's left hand thumb rule we decide the direction of direction of force. Since the rule says if the three fingers of your left hand are perpendicular to each other such that, the fore finger shows the direction of magnetic field, then the middle finger will show the direction of current and the thumb will show the direction of force.

Hence , in the figure the magnetic field is perpendicular to the loop, so the magnetic force will be upward.

2.) Using Right hand thumb rule we can decide the direction of current in the loop wire. The rule says that if the circular loop is in magnetic field, then the thumb points in the direction of magnetic field and the right curly fingers will show the direction of current.

In this case the cross shows that direction of magnetic field is inward direction of loop. Hence after applying the rule, the direction of current will be clockwise.

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