Electrostatic Shielding
Physics ⇒ Electricity and Magnetism
Electrostatic Shielding starts at 10 and continues till grade 12.
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See sample questions for grade 10
A hollow metal shell is placed in a region with a strong electric field. What is the electric field inside the shell?
A metal sphere is placed in a uniform external electric field. What happens to the electric field inside the sphere?
A scientist wants to measure a very weak electric field. Should the measuring device be placed inside a metal box? Why or why not?
A sensitive instrument is placed inside a metal enclosure. What is the main reason for doing this?
A television cable is covered with a metallic braid. What is the purpose of this braid?
Describe how a Faraday cage works.
A hollow metal shell is placed in a region with a strong electric field. What is the electric field inside the shell?
A scientist wants to measure a very weak electric field. Should the measuring device be placed inside a metal box? Why or why not?
A laboratory wants to protect a sensitive experiment from external electric fields. What should they use? (1) Wooden box (2) Glass enclosure (3) Metal enclosure (4) Plastic cover
Which law explains the principle of electrostatic shielding? (1) Ohm's Law (2) Gauss's Law (3) Faraday's Law (4) Ampere's Law
Which of the following is a limitation of electrostatic shielding? (1) It cannot shield against magnetic fields (2) It is expensive (3) It is only used in laboratories (4) It increases electric fields
Which of the following is NOT a property of a conductor in electrostatic equilibrium? (1) Electric field inside is zero (2) Charges reside on the surface (3) Electric field at the surface is perpendicular (4) Electric field inside is maximum
Fill in the blank: The effectiveness of electrostatic shielding depends on the __________ of the material used.
Fill in the blank: The effectiveness of electrostatic shielding increases with the __________ of the conductor used.
Fill in the blank: The electric field inside a hollow conductor is __________ when it is in electrostatic equilibrium.
Fill in the blank: The electric field just outside a charged conductor is __________ to the surface.
A charged object is placed inside a hollow, uncharged, conducting sphere. Will the electric field inside the sphere be zero?
True or False: A hollow metal sphere can be used to shield its interior from external electric fields.
True or False: Electrostatic shielding can be achieved using any insulating material.
True or False: Electrostatic shielding can protect against both static and changing electric fields equally well.
