![An aired cored inductor is connected in series with a switch and d.c. source. The switch is closed and left for some time. Explain why a spark is observed across the switch contacts when the switch is reopened. An aired cored inductor is connected in series with a switch and d.c. source. The switch is closed and left for some time. Explain why a spark is observed across the switch contacts when the switch is reopened.](https://digitalteachers.co.ug/wp-content/uploads/2021/04/Bbosa3.jpg)
An aired cored inductor is connected in series with a switch and d.c. source. The switch is closed and left for some time. Explain why a spark is observed across the switch contacts when the switch is reopened.
An aired cored inductor is connected in series with a switch and d.c. source. The switch is closed and left for some time. Explain why a spark is observed across the switch contacts when the switch is reopened. (03marks)
When the switch is opened, the falling current causes a change in the magnetic flux linking the inductor coil.
A change in the magnetic flux linking the coil, induce a large e.m.f in the circuit and leads to high the electric field intensity between the contact points causing ionization of gases.
When the oppositely charged ions collide, a spark is produced.
Please Subscribe to promote this website. Subscription is free
Share with a friend
Your comment is valuable
Thank you so much
CATEGORIES A- Magnetism
TAGS Dr. Bbosa Science