Name: Magnetic Effect of Electric Current
Uploaded: 2019-07-19
Duration: 7 min 45 s
Description: We know that electricity is used to generate heat in geysers and irons. Today, let’s experiment to see how electricity can be used to create a small magnet!

Question

Consider the figure given below.

Suppose that the two magnets were turned around so that there was a magnetic north pole on the left. Explain how the coil would move.

Accepted Answer

The rectangular loop ABCD is placed between the two poles of a magnetic field such that the arm $X$ $(AB)$ and $Y$ $(CD)$ are perpendicular to the direction of the magnetic field. Current in the coil $ABCD$ enters from the source battery through $X$ and flows back to the battery through $Y$ . Notice that the current in arm $AB$ of the coil flows from $A$ to $B$ . In arm $CD$ it flows from $C$ to $D$ , that is, opposite to the direction of current through arm $AB$ . On applying Fleming’s left-hand rule for the direction of force on a current-carrying conductor in a magnetic field, we find that the force acting on arm $AB$ pushes it downwards while the force acting on arm $CD$ pushes it upwards. Thus the coil which is free to turn about an axis, rotate clockwise.

David Sang Solutions for Chapter: Electromagnetic Forces, Exercise 2: Questions

David Sang Physics Solutions for Exercise - David Sang Solutions for Chapter: Electromagnetic Forces, Exercise 2: Questions

Questions from David Sang Solutions for Chapter: Electromagnetic Forces, Exercise 2: Questions with Hints & Solutions

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