why must the correct polarity be known when connecting equipment to a voltage source?
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why must the correct polarity be known when connecting equipment to a voltage source?
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- A system displaying a hysteresis loop such as a ferromagnet, is a device for storing memory?’ Explain the meaning of this statement.A mass spectrometer is being used to separate common oxygen-16 from the much rarer oxygen-18, taken from a sample of old glacial ice. (The relative abundance of these oxygen isotopes is related to climatic temperature at the time the ice was deposited.) The ratio of the masses of these two isotopes is 16 to 18, the mass of oxygen-16 is 2.66-10-26 m S they are singly charged and travel at 5.106 in a 1.25 T magnetic field. What is the separation Ad=2r₂-2r₁ between their paths when they hit a target after traversing a semicircle? Ion source F=qE FE Ad= F = qvB FB Things to Prepare: 1. Make a list of information given to you. + m Bout V 12r₁ 212 m₂ 2. Identify the formula for the radius of the trajectory for particles in the magnetic field. 3. Set - up the formulae in step 2 for the two for the particles. 4. How can you manipulate the formulae in step 3 to solve for the answer? Bout kg, andQuestion: The current in the circuit will be D₁ (a) 5/40 A (c) 5/10 A 20 92 www D₂ 20 Ω www 30 Ω www 5 V (b) 5/50 A (d) 5/20 A
- Two neutral, parallel wires are carrying current in the same direction. Are they attracted or repelled, and why?To ignite a mixture of gasoline and air inside an internal combustion engine--like in your car--a spark is generated by a high voltage across the spark plug, usually in the 10's of thousands of volts, but the battery is only 12 V. This massive increase in voltage is achieved through a transformer called the 'ignition coil'. A typical ignition coil has a primary with 300 turns wrapped around a radius of 2 cm over a linear distance of 15 cm. The secondary has 60,000 turns of wire over the same cylinder. The spark is generated when the current is suddenly shut off to the coil. Assuming that the magnetic field is uniform inside the primary and secondary coils, and that all of the magnetic field lines that go through the primary go through the secondary, what voltage is generated in the secondary coil if the current in the primary coil drops from 10 A to 0 A at a steady rate over the course of 50 mirco-seconds? Give your answer to 2 significant digits. Hint: Remember the definition of flux…please help with these two questions based on the graph