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Physics

Learn the toughest concepts covered in Physics with step-by-step video tutorials and practice problems by world-class tutors

28. Magnetic Fields and Forces

Magnets and Magnetic Fields

8 videos5 questions

VIDEOS 8

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PRACTICE 5

How Magnets Work Concept:
by Pearson
48views
Multiple Choice
Which option best completes the following sentence? If a magnet is carefully balanced, as in a compass, the north end of the magnet points roughly toward…
56views
Multiple Choice
A wire carries a positive current to the left in the plane of this screen. What is the direction of the magnetic field at a point near the top of the screen, still in the plane of the screen?
63views
Multiple Choice
At what distance from a wire carrying a 10 A current is the magnetic field strength equal to $50 μ T$ ? This is the approximate value of the earth’s magnetic field.
69views
1
Multiple Choice
Two long parallel wires lie in the $x y$ -plane, each carrying a $5.0$ A current in opposite directions. Wire 1 lies along the $y = 3.0 cm$ line and carries a current in the positive $x$ -direction; wire 2 lies along the $y = 0$ line and carries a current in the negative $x$ -direction. What is the magnitude of the magnetic field at the point $(0 cm, 1 .5 cm, 0 cm)$ ?
65views

Summary of Magnetism Problems

5 videos1 question

VIDEOS 5

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PRACTICE 1

Multiple Choice
A loop of wire with a radius of $2 . 0 cm$ lies in the $x y$ -plane and is centered on the origin. It carries a counterclockwise current of $1.0$ A when viewed from above the $x y$ -plane. A long, straight wire lies along the line $y = - 2.0 cm$ . so that it is tangent to the lowest point on the loop. This straight wire carries a current of $1.0 A$ in the negative x-direction. What is the strength of the magnetic field at the center of the loop?
39views

Force on Moving Charges & Right Hand Rule

7 videos1 question

VIDEOS 7

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PRACTICE 1

Multiple Choice
A charged particle moving in a magnetic field experiences a force toward the top of this screen when it is moving toward the right and the field is into this screen. Is this particle positive, negative or neutral?
66views

Circular Motion of Charges in Magnetic Fields

5 videos

VIDEOS 5

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Mass Spectrometer

7 videos2 questions

VIDEOS 7

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PRACTICE 2

Magnetic Force on Current-Carrying Wire

6 videos2 questions

VIDEOS 6

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PRACTICE 2

Force and Torque on Current Loops

6 videos2 questions

VIDEOS 6

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PRACTICE 2

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