How is a positive charge usually given to a neutral object?
Neutrons are added to the object
Protons are added to the object
Electrons are removed from the object
Protons are removed from the object
When a rubber rod is rubbed with fur, the rod becomes negatively charged due to the transfer of
electrons to the rod
electrons to the fur
protons to the fur
protons to the rod
When hair is combed with a hard rubber comb, the hair becomes positively charged because the comb
transfers protons to the hair
removes electrons from the hair
transfers electrons to the hair
removes protons from the hair
When a plastic rod is rubbed with wool, the wool acquires a positive charge because
protons are transferred from the rod to the wool
protons are transferred from the wood to the rod
electrons are transferred from the wool to the rod
electrons are transferred from the rod to the wool
When you rub an inflated balloon against a wool sweater, the balloon may then "stick" to a wall. This is due to
an increase in the number of electrons on the balloon
an increase in the number of protons on the balloon
a decrease in the number of neutrons on the balloon
a decrease in the number of protons on the balloon
Which condition must exist between two points in a conductor in order to maintain a flow of charge?
a potential difference
a magnetic field
a low resistance
a high resistance
Which voltage would cause a current of 0.5 ampere in a circut that has a resistance of 24 ohms?
6.0 V
24 V
12 V
48 V
A small, uncharged metal sphere is placed near a larger, negatively charged sphere. Which diagram best represents the charge distributions on the smaller sphere?
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An inflated balloon which has been rubbed against a person's hair is touched to a neeutral wall and remains attracted to it. Which diagram best represents the charge distribution on the balloon and wall?
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A 120-volt toaster is rated at 600 watts. Under normal conditions, the current in the toaster is
50 A
0.20A
10. A
25 A
What is the potential difference across a 2.0-0hm resistor that draws 2.0 amperes charge per second?
1.0 V
2.0 V
4.0 V
3.0 V
The potential difference across a resistor measures 40. volts and the current through it measures 4.0 amperes. The resistance of the resistor is
36 ohms
44 ohms
10 ohms
160 ohms
An electric current in a metal consists of moving
electrons
nuclei
protons
neutrons
In an electric circuit, which device acts as a safety feature?
fuse
battery
wire
light bulb
Which combination of current and voltage woudl use energy at the greatest rate?
10 A at 110 V
8 A at 110 V
3 A at 220 V
5 A at 110 V
If the current in a wire is 2.0 amperes and the potential difference across the wire is 10. volts, what is the resistance of the wire?
If the current in a wire is 2.0 amperes and the potential difference across the wire is 10. volts, what is the resistance of the wire?
5.0<
8.0
12
20
Which circuit below would have a current of electricity?
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