Two coaxial circular coils, P and Q , are placed near each other. An observer looks along their common axis such that coil P is closer to them. Coil P is connected to a battery through a switch, while coil Q is a closed metallic loop. When the switch is just closed, the current in coil P is clockwise as seen by the observer. What will be the direction of the induced current in coil Q as seen by the same observer, and

Step-by-step solution

When the switch is closed, the current in coil P increases from zero, causing an increasing magnetic flux through coil Q . As seen by the observer, the current in P is clockwise, so the magnetic field produced by P points away from the observer (towards Q ). According to Lenz's law, the induced current in Q will oppose this increase in flux. Therefore, coil Q will produce a magnetic field pointing towards the observer. For the magnetic field of Q to point towards the observer, the induced current in Q must be anti-