Chapter 13: Problem 2
In Faraday's experiments, what would be the advantage of using coils with many turns?
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Chapter 13: Problem 2
In Faraday's experiments, what would be the advantage of using coils with many turns?
These are the key concepts you need to understand to accurately answer the question.
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The square armature coil of an alternating current generator has 200 turns and is \(20.0 \mathrm{cm}\) on side. When it rotates at \(3600 \mathrm{rpm}\), its peak output voltage is \(120 \mathrm{V}\). (a) What is the frequency of the output voltage? (b) What is the strength of the magnetic field in which the coil is turning?
A 50-turn rectangular coil with dimensions \(0.15 \mathrm{m} \times 0.40 \mathrm{m}\) rotates in a uniform magnetic field of magnitude \(0.75 \mathrm{T}\) at 3600 rev/min. (a) Determine the emf induced in the coil as a function of time. (b) If the coil is connected to a \(1000-\Omega\) resistor, what is the power as a function of time required to keep the coil turning at 3600 rpm? (c) Answer part (b) if the coil is connected to a 2000 \(\Omega\) resistor.
(a) Does the induced emf in a circuit depend on the resistance of the circuit? (b) Does the induced current depend on the resistance of the circuit?
A short rod of length \(a\) moves with its velocity \(\overrightarrow{\mathbf{v}}\) parallel to an infinite wire carrying a current \(I\) (see below). If the end of the rod nearer the wire is a distance \(b\) from the wire, what is the emf induced in the rod?
A 50-turn coil has a diameter of 15 cm. The coil is placed in a spatially uniform magnetic field of magnitude \(0.50 \mathrm{T}\) so that the face of the coil and the magnetic field are perpendicular. Find the magnitude of the emf induced in the coil if the magnetic field is reduced to zero uniformly in (a) \(0.10 \mathrm{s},\) (b) \(1.0 \mathrm{s},\) and \((\mathrm{c}) 60 \mathrm{s}\).
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