Chapter 37, Problem 23A

When Tim pushes the wire down between the poles of the magnet, the galvanometer registers a pulse. When he lifts the wire, another pulse is registered. How do the pulses differ?

To determine

To explain: the reason of having two different pulses.

Answer to Problem 23A

The different pulses shows the opposite direction of current as one is positive and other is negative.

Explanation of Solution

Introduction:

When there is current flow, there will be some deflection in the galvanometer.

As the different poles of the magnet are connected the current will flow and it indicates by galvanometer in the form of a pulse. When the wire is lifted then there will also be the pulses generated but they are different from the first one. The one pulse is positive, and the other is negative, and it will change the direction of the current.

Conclusion:

The changing of the direction of the current shows that two pulses are different.