Magnets!!
Magnets & Electricity
MORE MORE MAGNETS
Miscellaneous
Do you know Ms Calle?
100
What are the electrical charges of points B and C, respectively?
positive, negative
100
What happens when a bar magnet is cut in half?
The bar magnet will become two monopole magnets, one with two north poles and one with two south poles.
100
What is an electromagnet?
a magnet created by passing an electric current through a coil of wire, and its magnetic field disappears when the current stops
100
Which of Kepler's Laws does the following describe?
Venus moves faster than Saturn around the sun
Kepler's 2nd Law!
100
What is Ms. Calle's favorite color?
Green :> !
200
You observe a pattern made by iron filings around two bar magnets.
If the left side of the lower magnet is the north pole, determine the poles at the labeled points.
south, north, south
200
What is the total magnetic field on both wires?
0
200
Karlo and Erika observed that two iron bars attract each other no matter which ends are placed close together. Karlo claims that both iron bars must be permanent magnets. Erika disagrees and claims that one bar is not a permanent magnet.
Erika’s claim is correct because both iron bars cannot be magnets because no matter which orientation the bars are placed in, they attract each other. If they were both permanent magnets, as Karlo claimed, the bars would repel each other when both of their north or south poles were placed near each other.
200
Which of Kepler's Laws does the following describe?
Neptune moves in an elliptical orbit around the sun
Kepler's 1st Law!
200
What did Ms. Calle Study in college?
Chemistry! and Education (duhh) !
300
You have an iron bar wrapped with 20 coils of wire and a D battery.
Which change would increase the magnetic strength?
Add another D battery!
300
What two actions would create a magnetic field?
Running current through coiled wire
Running current through straight wire
300
Identify the magnetic pole that aligns with Earth’s geographic North Pole using the information in the passage, and describe the reasoning for this identification.
The magnetic south pole aligns with Earth’s geographic North Pole. Because the compass points north when placed near the south pole of a bar magnet and it also points north when using for location, it must be Earth’s South Pole attracting the north pole of the compass magnet since opposite poles attract.
300
Which of Kepler's Laws does the following describe?
The square of the period of Mercury's orbit is proportional to the cube of the orbit's semimajor axis.
Kepler's 3rd Law!
300
Where did Ms. Calle go to college?
Bloomsburg University of Pennsylvania
400
What is the permanent magnet?
a type of magnet that retains its magnetic properties indefinitely, even after removing the external magnetic field.
400
What is a temporary magnet?
a material that exhibits magnetic properties only when exposed to an external magnetic field or an electric current, losing its magnetism when the external influence is removed.
400
Erika and Karlo make their compass using a nail, a leaf, a bowl of water, and a bar magnet. They drag the nail across the length of the bar magnet repeatedly in one direction. They place the nail on the leaf floating in the bowl of water, and the leaf moves so that the needle is pointing north. Which statement describes how the nail is able to act as a magnet in the compass?
The bar magnet aligned the atoms’ magnetic field in the nail, making it a temporary magnet.
400
A hot air balloon has a mass of 400 kg and is flying at about 6,400 km from the center of Earth. A satellite orbiting Earth has a mass of 5,000 kg and is located, on average, at about 36,000 km from the center of Earth. Which has the greater gravitational force?
The gravitational force on the hot air balloon is about 2.5 times as strong as the gravitational force on the satellite.!
400
How many bracelets does Ms. Calle wear everyday?
THREE
500
Battery A generates 0.5 amps of current through a wire connecting its terminals. Battery B generates 0.75 amps of current through a wire identical in material, length, and width connecting its terminals. Which of the following is true?
a. Battery A is older than Battery B.
b. Battery B has more electrons inside of it than Battery A does.
c. The difference in potential energy between terminals is greater for Battery B than for Battery A.
d. The resistance in the wire used for testing Battery A is greater than the resistance in the wire used for testing Battery B.
c. The difference in potential energy between terminals is greater for Battery B than for Battery A.
500
You have two 1-ohm and two 5-ohm resistors. Label resistors in Circuits A and B to make Circuit B produce a stronger magnetic field.
Circuit A has 5 ohm and 5 ohm
Circuit B has 1 ohm and 1 ohm
500
Explain why a small magnet had a stronger effect on the compass needle than the Earth’s magnetic field. Support your response with specific evidence or an example.
The small magnet was able to have a greater effect on the compass needle because it was held close to the compass, and, as magnetic strength increases as distance decreases, it was able to have a relatively large effect despite being a small magnet. Magnetic strength increases as magnets get closer, so a small magnet that is held very close to an object can have a larger effect on that object than a bigger magnet that is farther away
500
What energy sources are used by a. Solar Panels, b. Wind Turbines, c. Tidal Power Plants, and d. Fossil Fuels?
(Options: Releases greenhouse gases, Has mechanical energy as an input, and Uses photovoltaic cells to generate current)
a. Solar Panels -releases greenhouse gases
b. Wind Turbines & c. Tidal Power Plants - Has mechanical energy as an input
d. Fossil Fuels - Uses photovoltaic cells to generate current
500
What is Ms. Calle's favorite video game franchise?
Animal Crossing!! :>
(Legends of Zelda is a CLOSE second)