The drawing shows a straight wire carrying a current I Above

The drawing shows a straight wire carrying a current I. Above the wire is a rectangular loop that contains a resistor R. If the current I is decreasing in time, what is the direction of the induced current through the resistor R - left-to-right or right-to-left? If the induced current goes from left to right through the resistor, type the letters \"LTR\" in the box below. If the current goes from right to left through the resistor, type the letters \"RTL\" in the box. Direction of induced current =

Solution

With the current flowing in direction shown in figure. the magnetic flux through the rectangular loop is directed into page. If the current is decreasing in time, the change in flux is directed opposite to the flux itself. The induced current will then flow clockwise around the loop, producing a flux directed into the page through the loop and opposing the change in flux due to decreasing current in the long wire. So the answer is LTR. from left to right across resistor.(clockwise)