course phys202
1.Explain how to determine the magnetic flux of a uniform magnetic field through a plane loop of wire, and explain how the direction of the field and the direction of a line perpendicular to the plane of the region affect the result.-get the area of the loop by using Pi * r ^2 *telsa= strength of flux then multiply the result by the cosine angle.
2. Explain how to determine the average rate of change of magnetic flux due to a uniform magnetic field through a plane loop of wire, as the loop is rotated in a given time interval from an orientation perpendicular to the magnetic field to an orientation parallel to the magnetic field
- use the equation from the previous question Pi * r ^ 2 to find the area of the loop and multiply (testla). When the loop is parallel the fieldi zero. Then subtract the fluxes from each other , so the average rate of change of magnetic flux
3 .Explain how alternating current is produced by rotating a coil of wire with respect to a uniform magnetic field
- when the coil is paraelle there is no magnetic flux and the current is zero. But when it is perpendicular the flux is the strongest, then again at 180 the current and flux is zero. At 270 degrees the flux is the strongest again but the current is in the oppisite direction.
4.120V toaster with 4.2 amp current. What is the resistance current = voltage / resistance (Ohm's Law). The common sense of this is that for a given voltage, less resistance implies greater current while for given resistance, greater voltage implies greater current. More specifically, current is directly proportional to voltage and inversely proportional to resistance. In symbols this relationship is expressed as I = V / R.
-we use the equation R = V / I then substitute R = 120 volts / 4.2 amps = 29 ohms, approximate
5. 18.28. Max instantaneous voltage to a 2.7 kOhm resistor rated at 1/4 watt.
- power= V * I, current= voltage/resistance, then, V = sqrt(1/4 watt * 2.7 * 10^3 ohms) = 26 volts
&#Good work. Let me know if you have questions. &#