Q13 of 238 Page 82

Describe some experiment to show that the magnetic field is associated with an electric current.


let us take a copper wire AB on a plane such that it faces North-South. Now place a plotting compass under it. connect both end to a battery with a switch to put it on and off.


When the switch is on then the plotting compass needle shows deflection. When its turned off then the compass stop showing any deflection. This shows that the magnetic field is associated with electric field.


More from this chapter

All 238 →
11

Fill in the following blanks with suitable words:

(a) The lines of _____ round a straight-carrying conductor are in the shape of _____


(b) For a current-carrying solenoid, the magnetic field is like that of a _____


(d) The magnetic effect of a coil can be increased by increasing the number of _____, increasing the _____ or inserting an _____ core.


(e) If a coil is viewed from one end and the current flows in an anticlockwise direction, then this end is a _____ pole.


(f) If a coil is viewed from one end, and the current flows in a clockwise direction, then this end is a _____ pole.

 12

Describe how you will locate a current-carrying wire concealed in a wall.

 14

Draw a sketch to show the magnetic lines of force due to a current-carrying straight conductor.

 14

Name and state the rule to determine the direction of magnetic field around a straight current-carrying conductor.