Part 2 Flashcards
(25 cards)
The line integral of B around the loop is μ₀ · 7.0 A. Current I₃ is:
1 A into the screen
For the path shown,
∮ B⋅ ds=
μ₀(I₁ − I₂)
The magnetic field at point P is zero. What are the magnitude and direction of the current in the lower wire?
5 A to the left
What is the current direction in this loop? And which side of the loop is the north pole?
Current clockwise; north pole on bottom
Where is the north magnetic pole of this current loop?
Bottom side
The diagram shows a current loop perpendicular to the page. The direction of the current in the top and bottom wires is shown.
What is the direction of the magnetic field at the center of the loop?
To the right
What is the direction of the current in this solenoid, as viewed from the top?
Counterclockwise
Solenoid 2 has twice the diameter, twice the length, and twice as many turns as solenoid 1.How does the magnetic field 𝐵2 at the center of solenoid 2 compare to 𝐵1 at the center of solenoid 1?
B 2 =B 1
The current in this solenoid:
Enters on the right, leaves on the left
If released from rest, the current loop will:
Rotate counterclockwise
What is the current direction in the loop?
Out of the page at the bottom of the loop, into the page at the top
The diagram shows slices through two adjacent current loops.
What is the direction of the force on the right loop due to the loop on the left?
To the left
The direction of the magnetic force on the proton is:
Out of the screen
The direction of the magnetic force on the electron is:
The magnetic force is zero
Which magnetic field causes the observed force?
Which magnetic field (if it’s the correct strength) allows the electron to pass through the charged electrodes without being deflected?
Field into the screen
A charged particle enters a uniform magnetic field.
Which of the following statements is true?
The particle’s velocity changes.
A charged particle moving in a constant magnetic field:
May experience a magnetic force, but its speed will not change.
What is the direction of the magnetic field at the position of the dot?
Up
The positive charge is moving straight out of the page. What is the direction of the magnetic field at the position of the dot?
Down
A long, straight wire extends into and out of the screen. The current in the wire is:
Out of the screen
A long, straight wire carries a current 𝐼 to the right. Point 𝑃
is located above the wire.
What is the direction of the magnetic field at position P?
Out of the page
Point
𝑃
P is 5 cm above a long, straight wire carrying a current to the right. In which direction is the magnetic field at point P?
Down
Compared to the magnetic field at point A, the magnetic field at point B is:
Half as strong, opposite direction.
