Use this link to access the simulation: ( faraday_en.jnlp ) -select the \"Genera

Question

Use this link to access the simulation: (faraday_en.jnlp) -select the "Generator" tab at the top of the window. Click on "Reset All" button then check the "Show Field" box and uncheck the "Show Compass" box. Check your settings against the figure shown in Figure 11. Then slide the button on top of the faucet such that water starts pouring over the wheel that has a bar magnet tied to it.

Figure 11

When the wheel and bar magnet start rotating, the light bulb in the loop circuit lights up because

A. the magnetic flux through the loop changes. B. the wheel induces an electric current in the loop. C. the magnet increases its magnetic field.

Explanation / Answer

Answer : C) the magnetic flux through the loop changes

Explanation :

As the wheel/magnet rotates, the the magnetic flux linked through the loop changes. Thus by Lenz's Law, this flux change induces an electric current such that the induced mangetic field opposes this change.

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