Which will a positively charged object attract?
an object that has a negative charge
an object that has a smaller positive charge
an object that has no charge
an object that has a larger positive charge
An object that has a negatively charged would be attracted to a positively charged object.
Georgia moves an unattached piece of wire back and forth over a magnet. Which best explains what will happen?
A current will be induced because the wire moves through a magnetic field.
A current will not be induced because the wire moves through a magnetic field.
A current will be induced because the wire is not part of a closed circuit.
A current will not be induced because the wire is not part of a closed circuit.
A current will be induced because the wire moves through a magnetic field.
Nina is working with electricity and shortens the wires through which the current is flowing. What is Nina most likely trying to accomplish?
convert electric energy to heat
convert electric energy to light
increase resistance
decrease resistance
Nina is most likely trying to decrease resistance.
Cora, an electrician, wraps a copper wire with a thick plastic coating. What is she most likely trying to do?
keep the electric potential of the wire balanced
decrease the wire’s resistance
increase the voltage produced by the wire
keep a current from passing out of the wire
Cora is most likely trying to keep a current from passing out of the wire by adding a thick plastic coating.
How does increasing the distance between charged objects affect the electric force between them?
The electric force increases because the distance has an indirect relationship to the force.
The electric force increases because the distance has a direct relationship to the force.
The electric force decreases because the distance has an indirect relationship to the force.
The electric force decreases because the distance has a direct relationship to the force.
The electric force decreases because the distance has an inverse relationship to the force.
What is the resistance of a clock if it has a current of 0.30 A and runs on a 9.0-V battery?
0.033
2.7
9.3
30
To find the resistance (R), we can use Ohm's Law which states that voltage (V) is equal to the current (I) multiplied by the resistance (R):
V = I * R
R = V / I
Plugging in the given values:
R = 9.0 V / 0.30 A
R = 30 Ω
Therefore, the resistance of the clock is 30 Ω.
Aretha measures a circuit at 110 V and 240 . Using Ohm’s law, what can she calculate for the circuit?
voltage
ohms
resistance
current
Using Ohm's Law, we can calculate the current (I) in the circuit.
Ohm's Law: V = I * R
Given:
Voltage (V) = 110 V
Resistance (R) = 240 Ω
Rearranging the formula, we have:
I = V / R
I = 110 V / 240 Ω
Calculating this:
I ≈ 0.458 A
Therefore, Aretha can calculate the current (I) in the circuit, which is approximately 0.458 A.
An object that is made of which material is likely to be attracted to a magnet?
nitrogen
nickel
paper
plastic
An object made of nickel is likely to be attracted to a magnet.
A bar magnet is cut in half, as shown.
A bar magnet oriented horizontally labeled N to the left and S to the right. A dotted line runs vertically down from above the magnet to below through the center of the magnet.
Which shows the pieces after the magnet is cut?
2 pieces of broken magnet with a jagged edge on the inside side of each piece. On the left a piece labeled N S from left and on the right a piece labeled N S from left.
2 pieces of broken magnet with a jagged edge on the inside side of each piece. On the left a piece labeled N S from left and on the right a piece labeled S N from left.
2 pieces of broken magnet with a jagged edge on the inside side of each piece. On the left a piece labeled N and on the right a piece labeled S.
2 pieces of broken magnet with a jagged edge on the inside side of each piece. On the left a piece labeled S and on the right a piece labeled N.
The correct answer is: 2 pieces of broken magnet with a jagged edge on the inside side of each piece. On the left, there is a piece labeled N S from left, and on the right, there is a piece labeled S N from left.
Which device manages the flow of current in an electric circuit?
the wire
the switch
the battery
the light bulb
The switch manages the flow of current in an electric circuit.
The diagram shows a coiled wire that carries an electrical current.
Five orange coils have circular lines above and below the coils with arrowheads pointing to the left.
What do the arrows represent?
the magnetic field
thermal energy
light energy
the electric field
The arrows represent the magnetic field around the coiled wire.
Mateo makes a table of the symbols that represent the parts of an electric circuit.
A 2-column table with 4 rows. The first column labeled Symbol has entries circle with an X in it, short horizontal line at each end with a stack of vertical lines in the middle, which are from left to right very short short very short short, a short horizontal line then a small circle then a short line pointing up at about 45 degrees then a short gap then a small circle then a short horizontal line, a sort horizontal line then a zigzag then a short horizontal line. The second column labeled Component has entries empty, check mark, empty, empty.
What label should Mateo place in the marked cell?
Uses electrical energy
Provides electrical energy
Measures electric current
Controls electric current
Mateo should place the label "Provides electrical energy" in the marked cell.
Potential difference is measured in which units?
volts
amps
currents
watts
Potential difference is measured in volts.
How are the current and resistance related when the voltage of a circuit is constant?
The current doubles when the resistance doubles because they are directly proportional.
The current doubles when the resistance doubles because they are inversely proportional.
The current is cut in half when the resistance doubles because they are directly proportional.
The current is cut in half when the resistance doubles because they are inversely proportional.
When the voltage of a circuit is constant, the current is cut in half when the resistance doubles because they are inversely proportional.
Ohm’s law describes the relationship between which quantities?
voltage, resistance, and ohms
resistance, current, and amperes
current, voltage, and resistance
amperes, ohms, and current
Ohm's Law describes the relationship between current, voltage, and resistance.
isa makes a diagram to organize her notes about charging objects.
2 overlapping circles. The left circle is labeled Friction. The right circle is labeled Conduction. An X is in the overlap.
Which statement should she place in the region marked X?
Electrons move between objects.
The objects do not touch.
The objects develop opposite charges.
The objects have the same charge.
In the region marked X, the statement "The objects do not touch" should be placed.
What is required for an electric charge to flow through a wire?
zero resistance in the wire
a balance of electric potential
high resistance in the wire
a difference in electric potential
For an electric charge to flow through a wire, a difference in electric potential is required.
Which statement correctly describes Earth’s magnetic field?
A compass can lead a hiker to the geographic North Pole.
The magnetic pole near the South Pole is a north pole.
Compasses point toward a magnetic pole that is a north pole.
Field lines circle Earth from east to west.
The statement "Compasses point toward a magnetic pole that is a north pole" correctly describes Earth's magnetic field.
The image shows the electric field lines around two charged particles.
2 balls separated vertically. Lines with arrowheads run from the top ball to the bottom ball, curving more and more outward and then inward as they occur further from the shortest line connecting the balls. Curved lines with arrowheads point to the bottom ball from below and from the top ball upward. Label 1 is at the top left of the whole diagram. Label 2 is at the top right somewhat closer to the top ball than 1. Label 4 is midway between the balls on the shortest line connecting them. Label 3 is several lines to the left of 4.
At which position would the electric force be greatest?
1
2
3
4
The electric force would be greatest at position 3, which is several lines to the left of 4.
In a movie, a character cuts a wire, which stops the countdown timer of a bomb. What does cutting the wire do to the circuit?
It opens the circuit so that electric charges do not flow to the timer.
It closes the circuit so that electric charges do not flow to the timer.
It opens the circuit so that electric charges flow to the timer.
It closes the circuit so that electric charges flow to the timer.
Cutting the wire would open the circuit, preventing electric charges from flowing to the timer.
How are the magnetic field lines near the south pole of a magnet affected when a second south pole is brought near it?
The field lines combine with the lines around the second south pole.
The field lines overlap with the lines from the second south pole.
The field lines bend toward the second south pole.
The field lines bend away from the second south pole.
The magnetic field lines near the south pole of a magnet will bend away from the second south pole when it is brought near.
What is an advantage of series circuits?
Adding more batteries will increase the current.
There is more than one path for charges to flow.
If one bulb goes out, the other bulbs still shine.
Light bulbs get dimmer as more bulbs are added.
An advantage of a series circuit is that if one bulb goes out, the other bulbs still shine.
What happens to an iron bar when it is placed within the coils of a solenoid?
It induces a current.
It stops the current.
It becomes a magnet.
It loses its magnetism.
When an iron bar is placed within the coils of a solenoid, it becomes a magnet.
Frances drew a diagram to show electromagnetic induction.
A grey cube at left labeled N and a grey cube at right labeled S. A copper colored rod runs vertically between the cubes. Red arrows labeled X run from N to S.
Which label belongs in the area marked X?
Current
Magnetic field
Solenoid
Force on wire
The label "Current" belongs in the area marked X.
How do the lights in a series circuit behave when one bulb burns out?
The rest of the bulbs continue to shine at maximum brightness.
The rest of the bulbs continue to shine at a lower brightness.
The rest of the bulbs continue to shine at a higher brightness.
The rest of the bulbs stop shining and shut off.
When one bulb burns out in a series circuit, the rest of the bulbs stop shining and shut off.
72 percent thats good enough for me to pass sooo THANK YOUU :3
You're welcome! I'm glad I could help you. If you have any more questions, feel free to ask. Good luck with your studies!
Which describes the two cells formed through mitosis?
They are identical to each other but unlike the parent cell.
They are different from each other and the parent cell.
They are identical to each other and to the parent cell.