In: Physics
Question 1 (1 point)
We have two very long wires, which are parallel to each other pointing to the right in front of us. The pair of wire is horizontal. The wire closest to us carries a charge per unit length of 1mC/m and the other the opposite charge. The two wires are 1m apart and both move together at 100m/s along the wire to the right. We are looking at what happens in the middle region of the two wires (not the end). For the question pick all the right answers (there can be more than one correct answer).
Is it possible that the two electric and magnetic forces between the wires cancel out?
Question 1 options:
Yes if they have the same sign of charge |
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No |
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Yes if they have different charge magnitudes |
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Yes |
Question 2 (1 point)
We have two very long wires, which are parallel to each other pointing to the right in front of us. The pair of wire is horizontal. The wire closest to us carries a charge per unit length of 1mC/m and the other the opposite charge. The two wires are 1m apart and both move together at 100m/s along the wire to the right. We are looking at what happens in the middle region of the two wires (not the end). For the question pick all the right answers (there can be more than one correct answer).
What is the direction of the electric force between the two wires?
Question 2 options:
No force |
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The wires repel each other |
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Both forces have the same magnitude |
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The wires attract each other |
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One wire attracts the other repels |
Question 3 (1 point)
We have two very long wires, which are parallel to each other pointing to the right in front of us. The pair of wire is horizontal. The wire closest to us carries a charge per unit length of 1mC/m and the other the opposite charge. The two wires are 1m apart and both move together at 100m/s along the wire to the right. We are looking at what happens in the middle region of the two wires (not the end). For the question pick all the right answers (there can be more than one correct answer).
What is the strength of the magnetic force per unit length between the two wires?
Question 3 options:
more than 1nN/m |
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less than 1N |
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less than 1nN/m |
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more than 1 N |
Question 4 (1 point)
We have two very long wires, which are parallel to each other pointing to the right in front of us. The pair of wire is horizontal. The wire closest to us carries a charge per unit length of 1mC/m and the other the opposite charge. The two wires are 1m apart and both move together at 100m/s along the wire to the right. We are looking at what happens in the middle region of the two wires (not the end). For the question pick all the right answers (there can be more than one correct answer).
What is the direction of the magnetic force between the two wires?
Question 4 options:
They attract each other |
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The two forces are equal in magnitude |
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The two forces are not equal in magnitude |
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No force |
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They repeal each other |
Question 5 (1 point)
We have two very long wires, which are parallel to each other pointing to the right in front of us. The pair of wire is horizontal. The wire closest to us carries a charge per unit length of 1mC/m and the other the opposite charge. The two wires are 1m apart and both move together at 100m/s along the wire to the right. We are looking at what happens in the middle region of the two wires (not the end). For the question pick all the right answers (there can be more than one correct answer).
How fast would the speed need to be so that the magnitude of the electric force equals the magnitude of the magnetic force between the two wires?
Question 5 options:
Close to the speed of light |
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Below 1km/s |
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It is impossible |
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At much more than 1 km/s |
Question 6 (1 point)
We have two very long wires, which are parallel to each other pointing to the right in front of us. The pair of wire is horizontal. The wire closest to us carries a charge per unit length of 1mC/m and the other the opposite charge. The two wires are 1m apart and both move together at 100m/s along the wire to the right. We are looking at what happens in the middle region of the two wires (not the end). For the question pick all the right answers (there can be more than one correct answer).
What is the magnitude of the magnetic field in the middle between the two wires?
Question 6 options:
between 10nT and 100nT |
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below 100nT |
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between 50nT and 1microT |
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between 50 microT and 0.1mT |
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between 0.1mT and 1T |
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between 0.5microT and 10microT |
Question 7 (1 point)
We have two very long wires, which are parallel to each other pointing to the right in front of us. The pair of wire is horizontal. The wire closest to us carries a charge per unit length of 1mC/m and the other the opposite charge. The two wires are 1m apart and both move together at 100m/s along the wire to the right. We are looking at what happens in the middle region of the two wires (not the end). For the question pick all the right answers (there can be more than one correct answer).
What is the electric field magnitude in the middle between the 2 wires?
Question 7 options:
more than GV/m |
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zero |
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more than kV/m |
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more than MV/m |
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less than kV |
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less than GN/C |
Question 8 (1 point)
We have two very long wires, which are parallel to each other pointing to the right in front of us. The pair of wire is horizontal. The wire closest to us carries a charge per unit length of 1mC/m and the other the opposite charge. The two wires are 1m apart and both move together at 100m/s along the wire to the right. For the question pick all the right answers (there can be more than one correct answer).
What is the direction of the magnetic field half-way between the two wires (in the middle section of the wires)?
Question 8 options:
right |
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left |
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up |
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Other |
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down |
Question 9 (1 point)
We have two very long wires, which are parallel to each other pointing to the right in front of us. The pair of wire is horizontal. The wire closest to us carries a charge per unit length of 1mC/m and the other the opposite charge. The two wires are 1m apart and both move together at 100m/s along the wire to the right. We are looking at what happens in the middle region of the two wires (not the end). For the question pick all the right answers (there can be more than one correct answer).
What is the electric field direction halfway between the two wires?
Question 9 options:
It is zero |
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It points neither towards nor away from me |
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It points away from me |
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It points towards me |