Electrostatic Forces in Materials
Physics ⇒ Electricity and Magnetism
Electrostatic Forces in Materials starts at 10 and continues till grade 12.
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See sample questions for grade 10
A charged rod is brought near small pieces of paper, and the paper is attracted to the rod. Explain why this happens.
A glass rod is rubbed with silk. The glass rod becomes positively charged. What type of charge does the silk acquire?
A metal sphere is given a positive charge. What happens to the electrons in the sphere?
A plastic rod is rubbed with a wool cloth and becomes negatively charged. What happens to the wool cloth?
A charged rod is brought near small pieces of paper, and the paper is attracted to the rod. Explain why this happens.
A glass rod is rubbed with silk. The glass rod becomes positively charged. What type of charge does the silk acquire?
A metal sphere is given a positive charge. What happens to the electrons in the sphere?
A plastic rod is rubbed with a wool cloth and becomes negatively charged. What happens to the wool cloth?
Which material would you use to make the handle of a screwdriver for electrical work? (1) Iron (2) Copper (3) Plastic (4) Silver
Which of the following best describes polarization in a dielectric material? (1) Movement of free electrons (2) Alignment of electric dipoles (3) Creation of new charges (4) Loss of electrons
Which of the following best explains why a charged object can attract a neutral object? (1) The neutral object gains charge (2) The neutral object is repelled (3) The charges in the neutral object rearrange (4) The neutral object becomes a conductor
Which of the following is a property of dielectric materials? (1) They conduct electricity (2) They increase the capacitance of a capacitor (3) They have free electrons (4) They are always metals
Fill in the blank: The ability of a material to allow electric charges to flow through it is called ______.
Fill in the blank: The force between two charges is ______ proportional to the square of the distance between them.
Fill in the blank: The process of charging a conductor by bringing it near a charged object without touching is called ______.
Fill in the blank: The process of charging an object by rubbing it with another object is called ______.
State whether the following is true or false: Rubber is used to cover electrical wires because it is a good conductor.
True or False: Electrostatic forces can act through a vacuum.
True or False: In an insulator, electrons are tightly bound to their atoms.
True or False: In conductors, electric charges can move freely.
