In the figure below, the coils on the left are wound opposite the coils on the r
ID: 2040790 • Letter: I
Question
In the figure below, the coils on the left are wound opposite the coils on the right. Also note that the questions below are asking for direction of current flow through the resistor: either left-to-right or right-to-left or no current flow Two coils are placed near each other as shown in the figure below. The coil on the left is connected to a battery and a switch, and the coil on the right is connected to a resistor. (i)What is the direction of the current in the resistor at an instant immediately after the switch is thrown closed? (ii) What is the direction of the current in the resistor after the switch has been closed for several seconds? (iii) What is the direction of the current in the resistor at an instant after the switch has then been thrown open?Explanation / Answer
T =0 as the swtich is turned on the first inductor resists current flow, thus there is no current in eithwr circuit
Aftera long time,
Since both the inductors are wound in reverse directions, as the current in left circuit is anti clockwise, the current across resistor wil be clockwise.
When the switch is again opened, the right inductor inductor discharges slowly and the direction is clockwise