8. In which direction will the force be directed when a current is passed through the conductor positioned between two magnets as shown in the diagram below?
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11. The deflection on a CRT screen is 1.2 cm when the solenoid current is 1.5 A and the accelerating voltage is 500. V. If the solenoid current is changed to 3.0 A, what accelerating voltage is needed to maintain the same deflection?
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9. When the solenoid current in the arrangement used in Investigation 7.1.1 is 2.2 A, the beam in the CRT is deflected 1.2 cm. What will the deflection be if the solenoid current is increased to 3.6 A?
10. The deflection on a CRT screen is 1.4 cm when the accelerating voltage is 500 V. If the solenoid current is kept constant, what will happen to the magnetic deflection in the following cases? (a) The accelerating voltage is increased to four times its original value.
12. While holding a magnet in one hand you suspend five nails in a row from the south pole of the magnet. What is the induced pole on the last nail hanging at the bottom of the five nails?
(b) The electron speed is increased four times.
© Edvantage Interactive 2013 ISBN 978-0-9864778-5-0
Chapter 7 Magnetic Forces
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