A magnet moves inside a coil. Consider the following factors: I. Strength of the magnet II. Number of turns in the coil III. Speed at which the magnet moves Which can affect the emf induced in the coil? 1. All of them 2. III only 3. II only 4. I and II only 5. I only
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A stronger magnet will produce a larger magnetic field, leading to a higher induced EMF. ** Show more…
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1.) Should the speed at which a magnet is moved through a coil of wire affect the measured peak voltage across the coil? If so, how? 2)If a magnet is moved through a coil of wire South pole first instead of North pole first, how should the measured voltage response be affected? 3) Should the number of individual coils in the wire have an effect on the measured emf? If so, how? 4) Below draw a graph of the expected magnetic flux through a point in the coil as a function of time as the magnet passes through the coil.
Madhur L.
1. If a magnet is pushed in a coil, an electromotive force (voltage) is induced across the coil. If the same magnet is pushed into the width coil twice the number of loops, what do you think will happen to the induced emf? 2. If the polarity of the magnet is reversed from north pole to south pole, and brought near a coil, what happens to the direction of the induced current? Why?
Federico C.
Coil 1 has $L_{1}=25 \mathrm{mH}$ and $N_{1}=100$ turns. Coil 2 has $L_{2}=$ 40 $\mathrm{mH}$ and $N_{2}=200$ turns. The coils are fixed in place; their mutual inductance $M$ is 3.0 $\mathrm{mH}$ . $\mathrm{A} 6.0 \mathrm{mA}$ current in coil 1 is changing at the rate of 4.0 $\mathrm{A} / \mathrm{s}$ (a) What magnetic flux $\Phi_{12}$ links coil $1,$ and (b) what self-induced emf appears in that coil? (c) What magnetic flux $\Phi_{21}$ links coil $2,$ and $(\mathrm{d})$ what mutually induced emf appears in that coil?
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