In the four circuit diagrams at right, all resistors are identical, and all batteries have
the same ideal emf. Rank, from greatest to least, the currents 11 through
I2 > I3 > I4 > I1
I2 > I4 > I3 > I1
I3 > I4 > I1 > I2
I2 > I4 > I1 > I3
I1 > I4 = I3 > I2
An electron moves perpendicular to a magnetic field, experiencing the force
shown in the figure at right. What is the direction of B?
Toward the bottom of the page.
To the right in the page.
Into the page.
Toward the top of the page.
Out of the page.
To the left in the page.
In the diagram at right, an uncharged conducting bar is moving with constant velocity
V to the left through a region where there is a uniform magnetic field pointing out of
the page. What charge distribution will the bar have, as a result of its motion?
B out of page
The right side of the bar will have positive charge, and the left side of the bar will have negative charge.
The bar will gain a net positive charge, distributed uniformly along its length.
The left side of the bar will have positive charge, and the right side of the bar will have negative charge.
The bar will remain electrically neutral at all points.
The top of the bar will have positive charge, and the bottom of the bar will have negative charge.
The bottom of the bar will have positive charge, and the top of the bar will have negative charge.
The bar will gain a net negative charge, distributed uniformly along its length,
In the diagram at right, what is the potential difference across the 2 F capacitor?
The figure at right shows a sub-segment of a complete circuit. At a given moment, a
voltage measurement across the sub-segment indicates that point B is 12 V higher
than point A. At the same moment, the capacitor is known to have 12 C of stored
At what rate is the resistor consuming energy, at this moment?
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