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Chapter 23: Q2PE (page 860)

What is the value of the magnetic flux through the coil in figure b due to the wire?

Short Answer

Expert verified

The value of the magnetic flux coil is zero.

Step by step solution

01

Definition of Magnetic flux

The entire magnetic field that travels across a particular area is measured by magnetic flux. It's a helpful tool for describing the effects of the magnetic force on things in a specific location.

02

Calculate the value of flux

The flux created by a contour with an area\(A\)in a constant magnetic field\(B\)that makes an angle\(\phi \)with the plane of the contour can be expressed as,

\({\rm{\Phi = BAcos(}}\phi {\rm{)}}\)……………………(1)

The angle in the given situation is the right angle, hence the flux will be zero from equation (1) because the cosine of a right angle \({\rm{90}}^\circ \)is zero.

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Most popular questions from this chapter

A short circuit to the grounded metal case of an appliance occurs as shown in Figure \({\rm{23}}{\rm{.60}}\). The person touching the case is wet and only has a \({\rm{3}}{\rm{.00 k\Omega }}\) resistance to earth/ground.

(a) What is the voltage on the case if \({\rm{5}}{\rm{.00 mA}}\) flows through the person?

(b) What is the current in the short circuit if the resistance of the earth/ground wire is \({\rm{0}}{\rm{.200 \Omega }}\)?

(c) Will this trigger the \({\rm{20}}{\rm{.0 A}}\) circuit breaker supplying the appliance?

A plug-in transformer, like that in Figure\(23.29\), supplies\(9.00{\rm{ }}V\)to a video game system.

(a) How many turns are in its secondary coil, if its input voltage is\(120{\rm{ }}V\)and the primary coil has\(400\)turns?

(b) What is its input current when its output is\(1.30{\rm{ }}A\)?

A large superconducting magnet, used for magnetic resonance imaging, has a \(50.0{\rm{ }}H\) inductance. If you want current through it to be adjustable with a \(1.00{\rm{ }}s\) characteristic time constant, what is the minimum resistance of system?

The Tethered Satellite discussed in this module is producing 5.00 kV, and a current of 10.0 A flows. (a) What magnetic drag force does this produce if the system is moving at 7.80 km/s? (b) How much kinetic energy is removed from the system in 1.00 h, neglecting any change in altitude or velocity during that time? (c) What is the change in velocity if the mass of the system is 100,000 kg? (d) Discuss the long-term consequences (say, a week-long mission) on the space shuttle’s orbit, noting what effect a decrease in velocity has and assessing the magnitude of the effect.

If a current flows in the Satellite Tether shown in Figure 23.12, use Faraday’s law, Lenz’s law, and RHR-1to show that there is a magnetic force on the tether in the direction opposite to its velocity.
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