Question

Explain with the help of two activities that current carrying wire produces magnetic field. 

(OR)

How can you verify that a current carrying wire produces a magnetic field with the help of experiment?

Answer 1

Activity – 1

• Take a thermocole sheet and fix two thin sticks ol height 1cm. 
• Join the two sticks with the help of copper wire. 
• Take a battery, tap key and connect them in series with the copper wire which is thin. 
• Keep a marine compass needle beneath the wire. 
• If you press the tap key, current flows in the copper wire.
• Immediately the magnetic needle gets deflected. 
• This indicates that the magnetic field is increased when current flows through the conductor.

Activity – 2

• Take a wooden plank and make a hole. 
• Place the plank on the table. 
• Place the retort stand on it. 
• Pass copper wire through the hole. 
• Connect the two ends of the wire with battery through switch. 
• Place some compass needle around the hole. 
• When the current flows the magnetic needle deflects. 
• We can verify this by changing the direction of current. 
• So we can conclude the magnetic field surrounds a current carrying conductor.