HP CHP16 SEC1: ELECTRIC CHARGE
Terms in this set (23)
What are the two kinds of electric charge?
Negative and positive
What kind of charges repeal?
Protons and Neutrons are much bigger than _____
Electric charge is _______? (conserved or not-conserved)
What is the mass of an electron?
Symbol for charge?
What is charge (q) measured in?
What is the charge of a neutron?
a material in which charges can move freely
a material in which charges cannot move freely
_______ and _______ can be charged by contact
Conductors can be charged by _______
the process of charging a conductor by bringing it near anther charged object and grounding the conductor
A surface charge can be induced on insulators by ______
Why is an electrostatic spray gun more efficient than an ordinary spray gun?
More paint hits the object being painted because of an electrical attraction between the charged droplets and the oppositely charged object
The fundamental unit of charge, e, is the magnitude of the charge of a single _______ or _______.
n How are conductors different from insulators?
Conductors transfer charge easily, insulators do not
When a conductor is charged by induction, is the
induced surface charge on the conductor the same
or opposite the charge of the object inducing the surface charge?
Would life be different if the electron were positively charged and the proton were negatively charged?
No; positive and negative are arbitrary designations
Explain from an atomic viewpoint why charge is usually transferred by electrons.
Protons are relatively fixed in the nucleus, whereas the surrounding electrons can be transferred from one atom to another
Because of a higher moisture content, air is a better conductor of charge in the summer than in the winter. Would you expect the shocks from static electricity to be more severe in summer or winter? Explain your answer.
Winter; because more charge can accumulate before electric discharge occurs
A balloon is negatively charged by rubbing and then clings to a wall. Does this mean that the wall is positively charged?
The balloon induces a local surface charge on the wall, but the wall as a whole is not charged
Which effect proves more conclusively that an object is charged, attraction to or repulsion from another object? Explain.
Repulsion; because attraction can be the result of an induced surface charge, but repulsion occurs only when two objects each have a net charge
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