Magnetism and Electricity

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1.
4 points
During a physics lab, a plastic strip was rubbed with cotton and became positively charged. When the plastic strip was touched to a piece of aluminum foil, the foil moved toward the plastic strip. The attraction of the plastic strip and foil is due to...
2.
4 points
In order for current to flow in a circuit, there must be
3.
4 points
Magnetic field strength is
4.
4 points
What is the symbol for magnetic field?
5.
4 points
An example of a voltage source is
6.
4 points
A current is said to exist whenever _____.
7.
4 points
Magnets can be made by
8.
4 points
Marie blows a fuse in her bedroom. All of the lights and appliances go out in her room. When she checks on the rest of the house, she realizes that the power is on in all of the other rooms. This is because the house is wired in ____.
9.
4 points
A positive charge of 1.21 C moves at 2547 m/s and enters a magnetic field. If it experiences a force of 12 N, what is the magnetic field strength?
10.
4 points
Two charges separated by a distance of 1 meter exert a 20-N force on each other. If the charges are pulled to a 2 meter separation distance, the force on each charge will be
11.
4 points
Which law identifies the force of attraction between two charges based upon the inverse square of the distance between the charges?
12.
4 points
Rubber is put around wires to protect humans from the heat generated by current flowing through the wire. Rubber is used because it is a(n) _____.
13.
4 points
The SI unit of charge is the
14.
4 points
What are regions of atoms that magnetically aligned?
15.
4 points
A charge of 0.15 C moves vertically in magnetic field of 0.18 T that is oriented horizontally. What speed must the charge have to experience a force of 12 N?
16.
4 points
The q in Coulomb's law equation stands for the _____.
17.
4 points
Which law evaluates the relationship between voltage, current and resistance is...
18.
4 points
A bird can sit on a power line with two feet because
19.
4 points
A closed circuit is a circuit in which charge
20.
4 points
What is the difference between charge by induction and charge by polarization
21.
4 points
What is the resistance if voltage is 5.0 V and current is 1.32 A?
22.
4 points
Protons and electrons
23.
4 points
The symbol used to represent resistance in a schematic diagram is
24.
4 points
During a physics lab, a plastic strip was rubbed with cotton and the charges separated. This occurred due to ...
25.
4 points
A conductor differs from an insulator in that a conductor