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 11
A conducting shell has a charge +Q placed at its center. What is the net charge induced on the inner surface of the shell?
A conducting shell is placed in an external electric field. What happens to the electric field inside the shell?
A hollow conducting sphere is placed in a uniform electric field. What is the electric field at the center of the sphere?
A metal box is grounded and placed in a region with a strong external electric field. What is the electric field inside the box?
A conducting shell has a charge +Q placed at its center. What is the net charge induced on the inner surface of the shell?
A conducting shell is placed in an external electric field. What happens to the electric field inside the shell?
A hollow conducting sphere is placed in a uniform electric field. What is the electric field at the center of the sphere?
A metal box is grounded and placed in a region with a strong external electric field. What is the electric field inside the box?
Which law is used to explain the concept of electrostatic shielding? (1) Ohm's Law (2) Gauss's Law (3) Faraday's Law (4) Ampere's Law
Which of the following devices uses electrostatic shielding? (1) Microwave oven (2) Television (3) Faraday cage (4) Electric fan
Which of the following is a limitation of electrostatic shielding? (1) It cannot shield against static electric fields (2) It cannot shield against changing magnetic fields (3) It requires a vacuum (4) It only works at high temperatures
Which of the following is NOT a property of a conductor in electrostatic equilibrium? (1) The electric field inside is zero (2) The surface is an equipotential (3) The electric field just outside is perpendicular to the surface (4) The electric field inside is maximum
Fill in the blank: A __________ cage is an example of electrostatic shielding.
Fill in the blank: Electrostatic shielding is not effective against __________ fields.
Fill in the blank: The electric field inside a conductor in electrostatic equilibrium is __________.
Fill in the blank: The electric field just outside the surface of a charged conductor is __________ to the surface.
True or False: A hollow conductor can be used to shield its interior from external electric fields.
True or False: A hollow metallic sphere can shield its interior from both electric and magnetic fields.
True or False: Electrostatic shielding can be achieved using any insulating material.
True or False: Electrostatic shielding is effective only for static electric fields, not for changing magnetic fields.
