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Describe how an insulated metal sphere can be charged by induction using a nearby charged rod. - Leaving Cert Physics - Question g - 2022
Question g
Describe how an insulated metal sphere can be charged by induction using a nearby charged rod.
Worked Solution & Example Answer:Describe how an insulated metal sphere can be charged by induction using a nearby charged rod. - Leaving Cert Physics - Question g - 2022
Step 1
earth sphere [when rod is close]
Answer
When a charged rod is brought close to the insulated metal sphere, the charges in the sphere redistribute. If the rod is positively charged, the electrons in the sphere are attracted towards the rod, causing the near side of the sphere to become negatively charged and the far side to become positively charged. This process occurs without any physical contact between the rod and the sphere.
Step 2
de-earth sphere [while rod is close]
Answer
While the rod remains close to the sphere, the sphere can be grounded. This can be done by briefly touching it with a conductor connected to the ground. The negative charges will flow from the sphere to the ground, leaving the sphere with a net positive charge.
Step 3