Cracking the SAT Physics Subject Test

A permanent magnet creates a magnetic field in the surrounding space. The end of the magnet at which the field lines emerge is d ...

The following figure shows a bar magnet moving down, through a circular loop of wire. What will be the direction of the induced ...

Here’s How to Crack It The magnetic flux down through the loop increases as the magnet is moved. By Lenz’s law, the induced emf ...

In this case, the magnetic flux through the loop is upward and, as the south pole moves closer to the loop, the magnetic field ...

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Chapter 13 Comprehensive Drill See Chapter 17 for solutions. A metal rod of length L s pulled upward with constant velocity v t ...

(D) vBL, with point a at the higher potential (E) vBL, with point b at the higher potential The circle and ellipse below have t ...

(A) The induced current will be clockwise, and the magnetic field it produces will point out of the plane of the page. (B) The i ...

If the current in the wire is I, determine the current induced in the square loop. (A) (B) (C) (D) (E) 0 ...

In the figure below, a permanent bar magnet is pulled upward with a constant velocity through a loop of wire. ...

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Which of the following best describes the direction(s) of the current induced in the loop (looking down on the loop from above)? ...

Key Terms electromagnetic induction motional emf magnetic flux weber (wb) Faraday’s law of electromagnetic induction Lenz’s law ...

Summary Motional emf refers to the effects on a wire or other conductor that moves relative to a uniform magnetic field. The act ...

Chapter 14 Waves Waves make up approximately 20 percent of the SAT Physics Subject Test. But what are they, exactly? Imagine hol ...

TRANSVERSE TRAVELING WAVES Let’s return to our long rope. Someone standing near the system would see peaks and valleys actually ...

Since the direction in which the rope oscillates (vertically) is perpendicular to the direction in which the wave propagates (or ...

The simple equation v = λf shows how the wave speed, wavelength, and frequency are interconnected. It’s the most basic equation ...

Don’t be fooled by this formula. The speed of a wave does not depend on the frequency or wavelength. It depends on properties of ...

Notice that v depends only on the physical characteristics of the string—its tension and linear density. The medium (the rope) h ...