. Set up the circuit shown in Fig. 14.17 again


Set up the circuit shown in Fig. 14.17 again. Move the key to ‘ON’ position and watch careful in which direction the compass needle gets deflected. Switch ‘OFF’ the current. Now keeping rest of the circuit intact, reverse the connections at the terminal of the cell. Again, switch ‘on’ the current. Note the direction in which the needle gets deflected. Think of an explanation.

 

Best Answer

When the connection of cell is reversed, the compass needle moves in opposite direction. This shows that the polarity of the magnet depends on the direction of low of current.

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