physics project and need support to help me learn.
i Need help with these two labs. Please no hand writting. google docs or anything that I can download as pdf is fine. Thank You
Requirements: doesn’t matter
Physics 202 FINAL EXAM (50 Points) THERE ARE 6 QUESTIONS AND YOU ONLY NEED TO ANSWER 5. IF YOU ANSWER MORE THAN 5, I WILL ONLY GRADE THE FIRST 5. This is a take home exam. You may work together but you must show your own work and be able to explain it on the phone or via zoom within 24 hours if asked. If you work together, please include the names of anyone you worked with on your exam. You may ask me or the tutors quesSons, but you must solve the problems yourself. It is open book, open note, open internet except for any “ask and answer” sites such as Chegg, Slater, Yahoo Answers, Quora, or any site where someone will solve a unique problem for you. Remember: the point of this exam is that YOU understand, and carry these skills forward to any subsequent classes, jobs, life, cocktail party conversaSon, etc. 1. (10 points) Ampere’s Law A toroidal solenoid is shown in the image. To make one you wrap wire around a donut (torus) shape. In this case the donut is nonconduc;ng. Consider a toroid with an inner radius of 1.0 cm and an outer radius of 2.0 cm that has 100 closely spaced turns carrying current of 200 mA. a. Please draw the magne;c ﬁeld lines for this solenoid, labeling where it is strongest and where it is zero (or close to zero). b. Use Ampère’s law to ﬁnd the magne;c ﬁeld strength at a point inside the torus at distance r = 1.2 cm from the center of the toroid. c. Is a toroidal magne;c ﬁeld a uniform/constant ﬁeld like the inﬁnite solenoid? Explain. 2. (10 points) Coulomb’s Law A thin rod of length L, oriented in the x-direction, has charge +Q. The rod lies on the floor. The left end of the rod is touching a wall. On the floor, a small frictionless puck of mass M and charge Q is also touching the wall. The puck is a distance b from the left end of the rod. If the wall were removed, the puck would slide at an angle. But the wall constrains the puck to slide only in the y-direction. Here, the y-direction is not vertical. It’s along the floor, perpendicular to the rod. a. What is the puck’s acceleration, immediately after it’s released? Hint: The wall constrains the puck to accelerate only in the y-direction. Therefore, you need to worry only about the y-directed forces. If you can’t complete the math, that’s OK; but set things up completely. b. What normal force does the wall exert on the puck when the puck is first released? Hint: The normal force, which points in the x-direction, must cancel the x-component of the electric force. c. If b is much larger than L, what is the puck’s initial acceleration (to good approximation)? Could you have figured this out without solving part (a)?
3. (10 points) DC Circuit In this circuit R = 10.0 and εo = 5.0 V. a. What current ﬂows through the 6R resistor? b. One of the R resistors is snipped in half with wire cu]ers. Now what current ﬂows through the 6R resistor? 4. (10 points) AC RLC Series Circuit An inventor is building an electric heater. It will plug into standard American household electrical outlets, which supply an oscilla;ng EMF of frequency 60 Hz and rms voltage of 120 V. The inventor wants the heater to contain one resistor, one capacitor, and one inductor as drawn here. She has a C = 0.20 F capacitor, and her resistor is R = 10.0 Ω. a. For the device to generate as much heat as possible, what inductance should the inductor have? b. If she uses the inductor you suggested, how much heat does this device produce in 1 minute? c. Explain why commercially available heaters only use resistors with no capacitors or inductors. d. If you plug in this heater, for one minute, into a electrical outlet that supplies 120 V but at 50 Hz instead of 60 Hz, would the device generate more, less, or the same heat? Please explain. 5. (10 points) Faraday’s Law Consider a square metal picture frame of side length s, mass M, and total electrical resistance R. It is dropped from rest from a height H above a region of uniform magne;c ﬁeld poin;ng into the page. The frame accelerates downward under the inﬂuence of gravity un;l reaching the magne;c ﬁeld. It is observed that, while entering the magne;c ﬁeld, the frame moves with constant velocity. a. What is the frame’s speed when it begins to enter the magne;c ﬁeld? b. What is the strength of the magne;c ﬁeld? Solve for B in terms of the given physical quan;;es (s, M, R and H), and any constants you need. c. Ader the frame has completely entered the magne;c ﬁeld, what is the frame’s accelera;on? Jus;fy your answer in two sentences or less. 6. (10 points) Faraday’s Law The magne;c ﬁeld inside a 6.0-cm-diameter superconduc;ng solenoid varies sinusoidally between 4.0 T and 10.0 T at a frequency of 100 Hz. a. What is the maximum electric ﬁeld strength at a point 2.0 cm from the solenoid axis? b. What is the value of B at the instant E reaches its maximum value?
Lab 10: FaradayÕs LawsContents:¥Learning Goals ÉÉ.ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ¥Directions ÉÉÉÉ…ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ11I. Learning GoalsStudents will be able to:¥Identify equipment and conditions that produce induction¥Predict how the current will change when the conditions are varied.¥Compare and contrast how both a light bulb and voltmeter can be used to show characteristics of the induced current. LenzÕs Law:II. DirectionsLook at the simulation and answer the questions¥Open the Faraday Law simulation (https://phet.colorado.edu/en/simulations/faraday) and discover what you can about induction. Make a list of ways to cause induction. ¥What made you think that induction had occurred? ¥Open FaradayÕs Electromagnet Lab. Investigate using the window called Pickup Coil. See if you can discover more things that effect induction and add them to your list. ¥In this simulation, there is another way to show that induction is happening. Explain why this method may not have been used in the simpler simulation.
¥Describe in your own words what induction means. ¥Write a comparative paragraph to meet the third learning goal. Make sure to consider the strengths and weaknesses of each as an indicator of current. ¥Design an experiment to determine how the size and direction of the induced current will change when the conditions are varied. Collect data, make observations and record your information in a table. ¥Write a summary that demonstrates that you can meet the first two learning goals.
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