JPN 101 Lecture Notes - Lecture 3: Pronoun

how i draw the direction of arrow for the R,S configuration of each chiral central of vitamin d3 molecule

) Two parallel wires 20 cm apart carry currents in opposite directions of 10 A. Is
there a force acting on the wires and when this is the case what is the direction of the
force? Is there a point on the connecting line between the two wires where the
magnetic field is zero and when this is so, where is that point. 

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.

(a) What is the direction of the current in the resistor at an instant immediately after the switch is thrown closed?

(b) What is the direction of the current in the resistor after the switch has been closed for several seconds?

(c) What is the direction of the current in the resistor at an instant after the switch has then been thrown open?