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Chapter 4: Q9DQ (page 947)
A current was sent through a helical coil spring. The spring contracted, as though it had been compressed. Why?
Due to opposite poles which area attracted to each other cause the spring compress.
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Question: A positive point charge is placed near a very large conducting plane. A professor of physics asserted that the field caused by this configuration is the same as would be obtained by removing the plane and placing a negative point charge of equal magnitude in the mirror image position behind the initial position of the plane. Is this correct? Why or why not?
An open plastic soda bottle with an opening diameter of is placed on a table. A uniform magnetic field directed upward and oriented from the vertical encompasses the bottle. What is the total magnetic flux through the plastic of the soda bottle?
A heart defibrillator is used to enable the heart to start beating if it has stopped. This is done by passing a large current ofthrough the body atfor a very short time, usuallyabout . (a) What power does the defibrillator deliver to the body, and (b) how much energy is transferred ?
Section 27.2 describes a procedure for finding the direction of the magnetic force using your right hand. If you use the same procedure, but with your left hand, will you get the correct direction for the force? Explain.
A particle with massand a charge of has, at a given instant, a velocity.What are the magnitude and direction of the particle鈥檚 acceleration produced by a uniform magnetic field?
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