A sliding bar is moving to the left along a conductive rail in the presence of a magnetic field at the velocity of 3m/s as shown: rail 0 u y The field is given by B=-3a, -4a, (Tesla). a, is oriented out of the page. Find Vemf if W = 1m. Select one: O a 9V O b. 3V OC 6V O d. 7V W Vemf +

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Q: HOW A MAGNETIC FIELD IS PRODUCED

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Solenoids

A solenoid is a common term for a telephone coil used as an electromagnet. It also refers to any device that uses a solenoid to convert electrical energy into mechanical energy. The device generates a magnetic field from an electric field and uses the magnetic field to produce precise motion. Solenoid valves are often used to change power, such as in-car transmitters or valves, such as in the fuel system.