Question: A device called a railgun uses the magnetic force on currents to launch projectiles at very high speeds. An idealized model of a railgun is

A device called a railgun uses the magnetic force on currents to launch projectiles at very high speeds. An idealized model of a railgun is illustrated in (Figure 1). A 1.2 V power supply is connected to two conducting rails. A segment of copper wire, in a region of uniform magnetic field, slides freely on the rails. The wire has a 0.73 m resistance and a mass of 8.0 g. Ignore the resistance of the rails. At some moment, the power supply is switched on.

What is the current? answer: 1.6kA

What is the magnitude of the force on the wire? Answer: 200N

THE QUESTION

What will be the wire's speed after it has slid a distance of 1.0 mmmm?

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