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Physics, 10.11.2020 14:00 julesR6646

1.)Knowing that power source is required to get the electrons in the atoms of electric wire to move, can you explain why batteries are listed with + and - signs? -It's showing the higher and lower values and which direction the electrons are flowing.

2.)According to Kirschhoff's Junction Law, if a junction has four wires connected to it, and two of the wires are bringing in a current of 8 A and 12 A respectively, which of the following would be correct estimation for the amount of current leaving through the remaining two wires
-13 A and 7 A

3.)A geographic compass is used to tell the direction you are facing on the Earth. A compass has a movable needle in it that is a magnet with the north pole painted red. Where that red needle points is the direction north on the Earth. The needle moves because it interacts with the magnetic field of the Earth. Which of the following statements is the most true?
-The geographic North Pole of the Earth is actually the magnetic South Pole

4).Which of the following would NOT be an example of an insulator?
Salt water

5.)In a transformer, the incoming primary voltage is 120 V. There are 100 windings in the primary coil. The secondary coil has 65 windings. What is the outgoing voltage of this transformer?
78.02 V

6.)What must happen with a magnet in order for it to produce an electric current?
The magnet must move

7.)What is a free electron?
An electron that has removed itself from the atom it was attached to and can move to other atoms without restriction

8.)Which of the following accurately describes how a magnetic motor works
Im not sure i got this wrong but its probably, A set of electric coils are placed in a magnetic field. When a current passes through them, they create a magnetic field which interacts with the first magnetic field, causing the set of coils to rotate

9.)What shape must you make with a wire in a circut to have that current generate a magnetic field that is identical to the magnetic field produced by a normal bar magnet?
A coil

10.)Describe how Kirschhoff's Circuit Laws relate to the law of conservation of energy
Kirchhoff's loop rule is based on the law of conservation of energy, which states, the total energy gained per unit charge must equal the amount of energy lost per unit of charge

11.)When you move a magnet into a coil of wires, it induces a current in the wires. When you move the magnet out of the coils, it still induces a current. What is differnet about the currents created in these situations?
while moving a magnet around a coil of wire, or moving a coil of wire around a magnet it pushes the electrons in the wire and creates an electrical current so the difference is that how it affects the flow of the electrons and how they move

12.)A 12 volt battery is connected to two resistors in series. The first resistor has a resitance value of 5 Ohms and the current through the circuit is 1.5 Amps. What is the value of the second resistor?
3 Ohms

13.)A set of three resistors are set up in parallel. The resistor values are R1 = 3.0 Ohms, R2 = 11.0 Ohms, and R3 = 7.5 Ohms.
1.79 Ohms

14.) also got this wrong but the answer wasn’t, Change the material of the wire to something more conductive

15.)Describe the graph created by an Ohmic Device on a Voltage vs Current axis
A straight-line resistance graph that slopes upwards

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