Answers TX-Physics BMagnetic Field and Force

Magnetic Field and Force — Unit test Answers

15 verified answers1 views

Free Preview

Lidia makes a graphic organizer to compare temporary magnets with permanent magnets.

X: Maintains magnetic properties in the presence of another magnetY: Is made from magnetically hard ferromagnetic material

X: Repels or attracts other magnetsY: Attracts iron objects

X: Maintains magnetic properties in the presence of another magnetY: Is made from magnetically soft ferromagnetic material

X: Attracts or repels iron objectsY: Attracts other magnets

Free Preview

How should he position the pipe cleaners? Check all that apply.

They should exit the box at N and enter at S.

They should exit the box at S and enter at N.

They should be put inside the box so the two ends join.

None should be put inside the box.

They should form loops outside of the box over the top, bottom, and sides of the box.

They should form loops outside of the box, but over only the sides of the box.

A force of 1.5 × 102 N is exerted on a charge of 1.4 × 10–7 C that is traveling at an angle of 75° to a magnetic field.

8.2 × 102 T

8.5 × 102 T

3.2 × 103 T

6.4 × 1010 T

Trina makes a diagram to summarize how to use the right-hand rule to determine the direction of the magnetic force on each type of charge.

X: Thumb, for velocityY: Fingers, for magnetic fieldZ: Palm of hand, for force

X: Back of hand, for forceY: Thumb, for velocityZ: Palm of hand, for force

X: Palm of hand, for forceY: Thumb, for velocityZ: Fingers, for magnetic field

X: Palm of hand, for forceY: Fingers, for magnetic fieldZ: Back of hand, for force

A charged particle moves at 2.5 × 104 m/s at an angle of 25° to a magnetic field that has a field strength of 8.1 × 10–2 T.

3.7 × 10–5 C

4.1 × 10–5 C

8.8 × 10–5 C

1.0 × 10–4 C

Gazala makes the device shown in the diagram and uses it to pick up four paper clips on the point of the nail.

reversing the battery

reversing the nail and using the nail’s head

wrapping the wire around the nail more times

unwrapping several loops of the wire from the nail

Trent builds a model electric motor. When he connects a battery to the motor, the motor spins through a half rotation and stops.

replacing the battery, because it is not providing current

installing new brushes, because they are not making a good connection

checking the commutator, because the current is not reversing

adding more wire coils in the armature, because the electromagnet is too weak

Did you find these answers helpful?

More from this Course