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Unformatted text preview: Find the current needed in the coil to rotate the compass by 60.0˚. 2 3. A coil of wire is connected to 1.50V battery. After 3.00s have elapsed the current is 2.00mA and after 10.0minutes the current is 5.00mA. Find the inductance and resistance of the coil. 4. A 1000 turn coil with a 5.00cm radius has its axis pointing perpendicular to the earth's magnetic field of 52.0μT spins at 125rpm. (a)Find the peak voltage induced in the coil. (b)Find the rms voltage induced in the coil. (c)Sketch a graph of the voltage as a function of time. Label the two key parameters associated with the graph. 3 5. In the lab you studied a transformer with the primary coils connected to a battery and the secondary coils connected to a small light bulb as shown at the right. Explain how you got the light bulb to light and what fundamental physical laws are illustrated by the systems behavior. transformer battery light bulb...
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- Fall '09
- Work, Magnetic Field, Incandescent light bulb