[Q7] Two long, straight, wires go through a wall and are perpendicular to it. One wire carries a current of 3.0 A into the wall, and the other 1.5 A out of the wall. What is the magnitude of the magnetic force per meter on the wires if they are 5.1 cm apart? a. b. c. d. 111 N/m 185 N/m 29 N/m 18 uN/m e. None of the above

[Q7] Two long, straight, wires go through a wall and are perpendicular to it. One wire carries a current of 3.0 A into the wall, and the other 1.5 A out of the wall. What is the magnitude of the magnetic force per meter on the wires if they are 5.1 cm apart? a. b. c. d. 111 N/m 185 N/m 29 N/m 18 uN/m e. None of the above

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter22: Magnetism

Section: Chapter Questions

Problem 15PE: (a) An oxygen16 ion with a mass at 2.661026kg travels at 5.00106m/s perpendicular to a 1.20T...

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(a) An oxygen16 ion with a mass at 2.661026kg travels at 5.00106m/s perpendicular to a 1.20T magnetic field, which makes it move in a circular arc with a 0.231-m radius. What positive charge is on the ion? (b) What is the radio of this charge to the charge of an electron? (c) Discuss why the radio found in (b) should be an integer.
CASE STUDY In Example 34.6 (page 1111), we imagined equipping 1950DA, an asteroid on a collision course with the Earth, with a solar sail in hopes of ejecting it from the solar system. We found that the enormous size required for the solar sail makes the plan impossible at this time. Of course, there is no need to eject such an object from the solar system: we only need to change the orbit. A much more pressing problem is Apophis, a 300-m asteroid that may be on a collision course with the Earth and is due to come by on April 13, 2029. It is unlikely to hit the Earth on that pass, but it will return again in 2036. If Apophis passes through a 600-m keyhole on its 2029 pass, it is expected to hit the Earth in 2036. causing great damage. There are plans to deflect Apophis when it comes by in 2029. For example, we could hit it with a 10- to 150-kg impactor accelerated by a solar sail. The impactor is launched from the Earth to start orbiting the Sun in the same direction as the Earth and Apophis. The idea is to use a solar sail to accelerate the impactor so that it reverses direction and collides head-on with Apophis at 8090 km/s and thereby keeps Apophis out of the keyhole. Consider the momentum in the impactors orbit (Fig. P34.75) when the solar sail makes an angle of = 60 with the tangent to its orbit. Current solar sails may be about 40 m on a side, but the hope is to construct some that are about 160 m on a side. Estimate the impactors tangential acceleration when it is about 1 AU from the Sun. Keep in mind that the sail is neither a perfect absorber nor a perfect reflector, and a heavier impactor would presumably be equipped with a larger sail. Dont be surprised by what may seem like a very small acceleration. FIGURE P34.75
The potential difference V(t) between parallel plates shown above is instantaneously increasing at a rate of 107V/s. What is the displacement current between the plates if the separation of the plates is 1.00 cm and they have an area of 0.200m2?
Lunar astronauts placed a reflector on the Moon's Surface, off which a laser beam is periodically reflected. The distance to the Moon is calculated from the round-trip time. (a) To what accuracy in meters can the distance to the Moon be determined, if this time can be measured to 0.100 ns? (b) What percent accuracy is this, given the average distance to the Moon is 3.84108m ?
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1. An air-filled parallel plate capacitor is being charged. As a result the electric field between the plates is increasing as follows: E(t) = (2.00 x 1014 v/m-s)t, where t is time in seconds. The area of each plate is 100 cm². What is the displacement current between the plates (in A)?
3. Can we use the motional EMF to light a light bulb? We drag a rectangular conducting frame with a light bulb connected as shown. Which is true? The light bulb will light up due to a clockwise (CW) current generated by the CW motional EMF. The light bulb will light up due to a counterclockwise (CCW) current generated by the CCW motional EMF. L В (out) The light bulb will not light up since the magnetic force will generate a CCW EMF on the left side of the frame and a CW EMF on the right side. The light bulb will not light up since the magnetic force will generate a CW EMF on the left side of the frame and a CCW EMF on the right. o Wo
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17. At what rate must the potential difference between the plates of a parallel-plate capacitor with a 2.2 µF capacitance be changed to produce a displacement current of 2.1 A? (a) 8.6x105 V/s(b) 9.0x105 v/s(c) 9.5x106 V/s(d) 8.2x106 V/s(e) None of the above
1. An air-filled parallel plate capacitor is being charged. As a result the electric field between the plates is increasing as follows: E(t) = (2.00 x 1014 v/m-s)t, where t is time in seconds. The area of each %3D plate is 100 cm?. What is the displacement current between the plates (in A)? (A) 5.54 (B) 8.00 (C) 12.5 (D) 17.7 (E) 22.3 (F) 26.0