Question

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
	No
	Yes if they have different charge magnitudes
	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
	The wires repel each other
	Both forces have the same magnitude
	The wires attract each other
	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
	less than 1N
	less than 1nN/m
	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
	The two forces are equal in magnitude
	The two forces are not equal in magnitude
	No force
	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
	Below 1km/s
	It is impossible
	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
	below 100nT
	between 50nT and 1microT
	between 50 microT and 0.1mT
	between 0.1mT and 1T
	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
	zero
	more than kV/m
	more than MV/m
	less than kV
	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
	left
	up
	Other
	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
	It points neither towards nor away from me
	It points away from me
	It points towards me

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Answer 1