Electrostatic Induction
Physics ⇒ Electricity and Magnetism
Electrostatic Induction starts at 10 and continues till grade 12.
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See sample questions for grade 11
A metal sphere is initially neutral. A negatively charged rod is brought near it, and the sphere is then grounded. What is the sign of the charge left on the sphere after the ground and rod are removed?
A metal sphere is suspended by an insulating thread. A positively charged rod is brought near it, and the sphere is momentarily grounded. What is the net charge on the sphere after the ground and rod are removed?
A metal sphere of radius 5 cm is placed near a point charge of +10 μC. If the sphere is grounded while the charge is nearby, what is the sign of the charge induced on the sphere?
A neutral metal sphere is placed near a charged rod. If the sphere is grounded and then the ground is removed before the rod, what is the net charge on the sphere?
A neutral metal sphere is placed near a negatively charged rod. If the sphere is not grounded, what happens to its net charge after the rod is removed?
A neutral metal sphere is placed on an insulating stand. A positively charged rod is brought near it, and the sphere is grounded. What is the final charge on the sphere after the ground and the rod are removed?
Describe the difference between charging by induction and charging by conduction.
Describe what happens to the electrons in a metal when a negatively charged object is brought near it (without touching).
Explain why a charged object can attract a neutral conductor by induction.
Explain why grounding a conductor during electrostatic induction can result in the conductor becoming charged.
Explain why the process of electrostatic induction does not violate the law of conservation of charge.
If a conductor is charged by induction using a negatively charged rod and grounding, what is the sign of the charge left on the conductor?
State one practical application of electrostatic induction.
What is electrostatic induction?
A long, neutral conducting cylinder is placed parallel to a long, positively charged rod. Describe and explain the distribution of charges on the surface of the cylinder due to electrostatic induction.
A neutral conducting sphere of radius R is placed at a distance d (d >> R) from a point charge +Q. Calculate the approximate magnitude of the induced charge on the side of the sphere closest to the point charge. Assume the sphere is not grounded.
A neutral metal sphere is placed between two oppositely charged plates. Describe the distribution of charges on the sphere and explain the underlying principle.
A positively charged rod is brought near a neutral metal sphere, which is then connected to the ground. If the grounding wire is removed before the rod, what is the direction of electron flow during grounding, and what is the final charge on the sphere?
A small neutral metal sphere A is placed near a large charged metal plate. Without touching the plate, sphere A is momentarily grounded and then the ground is removed. Explain, using the concept of electrostatic induction, why sphere A acquires a net charge and state the sign of this charge if the plate is negatively charged.
When a charged object is brought near a neutral conductor, the conductor is said to be polarized. Explain, at the atomic level, how this polarization occurs and why it is different in conductors compared to insulators.
