20 Questions
Particles with electric charge interact with other particles with electric ______
charge
Two kinds of electric charge exist: positive and ______
negative
Objects that have equal numbers of positively charged particles and negatively charged particles are called ______
neutral
Electric charge is a property of matter that causes electrical ______
phenomena
Most objects you regularly encounter are ______ because they have no overall charge
neutral
When your friend pulls a wool sweater over his head, negatively charged particles from the sweater transfer to each hair on his head, making each strand of hair negatively charged.
True
The electric force between strands of hair that have the same charge is repulsive.
True
When two objects have opposite charges, the electric forces between them are repulsive.
False
Rubbing a balloon on your hair will give the balloon a positive charge.
False
When a negatively charged balloon is held close to the wall, the area near the balloon becomes positively charged due to the repulsion of the negatively charged particles in the wall.
True
The strength of the electric field tells you how strong the force would be if you put a particle with 2 C of charge in it.
False
Electric fields that surround charged objects are similar to magnetic fields that surround objects that have mass.
False
A test object, when discussing electric fields, is an imaginary object with exactly 1 C of charge.
True
Particles with 0.5 C of charge would experience twice as much force in an electric field.
False
When two objects have opposite charges, the electric forces between them are attractive.
True
Electric fields predict the force on an object, specifically a positively charged test object.
True
When you rub a balloon on your hair, the negatively charged particles that moved to the balloon stay near the surface of the balloon and do not move around in the rubber that makes up the balloon.
True
Electric charges can move through all materials, regardless of their properties.
False
Electric current can travel through all materials at the same rate.
False
Most metals, such as copper, iron, and gold, are insulators.
False
Learn about the science behind the magic trick of making a balloon stick to the wall after rubbing it on your hair. Understand the concept of electric charge and how it causes the balloon to attract the wall.
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