ASSESSMENT IN GENERAL PHYSICS 2FOURTH QUARTERS.Y. 2020-2021I. MULTIPLE CHOICE:Directions: Read the statements/questions carefully. Choose the letter of the correct answer and write your answerbefore the item number.1. The speed of the magnet decreases as it moves towards a coil, while the magnitude of the induced currentalsoA. increasesB. zeroC. decreasesD. no changethe magnitude of induced current alsoC. increase; decreases2. As the strength of a magnetA. decreases; increasesB. increases; increasesD. decreases; no change3. Electromotive force can be induced byA. Moving a magnet near a wireC. Changing magnetic field in a nearby wireB. Moving the wire near the magnetD. All of theselo sutod4. Which of the statements is true when there is change in magnetic field in a closed loop of wire.C. Electromotive force is induced in the wireA. There is no current induced in the wireB. The induced current is free to move in any direction of the wireD. All of these5. Which of the following is NOT a way a magnetic field can be varied to induce a current in a wire?C. Change the strength of the magnetic field aD. Move the coil out of the magnetic fieldA. Rotate the coil inside the magnetic fieldB. Move the coil in and out the magnetic field6. What are the two main applications for AC?A. Direct, pulsatingyob tw.sD. Static, dynamicC. Power, informationB. Electric, magnetic7. The distance that a signal's energy can travel in the time it takes for one cycle to occur is called the signal's:ww.sC. Wavelength8. One oscilloscope selector knob that allows the major and minor divisions of the graticule to be used to determine aA. AmplitudeB. FrequencyD. Periodsignal amplitude value is called the:A. Time/cm ControlsusodD. Volts/cm controlB. Position ControlC. Intensity control9. If current varies periodically from zero to a maximum, back to zero, and then repeats, the signal is:hiD. Repetitive fon ob verA. DirectB. AlternatingC. Pulsating10. What voltage will an AC voltmeter display?A. RmsB. AverageC. PeakD. Peak-to-Peak11. What is the peak value of a household appliance that uses a 230 V aC source?В. 230 VА. 163 VC. 325 VD. 480 V12. What is the waveform period difference between the 60 Hz electricity used in this country and the 50 Hz used inEurope?elidwniog leoA. 3 msB. 16 msibusbC. 4 msD. 20 msoido13. Test equipment selection enables the technician to both generate signals and:C. Sense circuit conditionsD. Change signal frequencies.A. Change circuit conditionsB. Inject signals14. Why is ac current transfer more effective than dc current transfer over longdistances?A. Due to the height of power linesC. Due to step-up and step-down transformers reduing !2R lossesB. Due to the used of generatorsD. Due to very high voltages15.A sine wave reaches maximum positive voltage at:C. -90°В. 0°D. 360°A. 90°16. The phenomenon which occurs when the light rays travel from a more optically denser medium to a less opticadenser medium.C. polarizationD. total internal reflectionA. refractionB. interference17. Which of these undergoes total internal reflection?

1. The speed of the magnet decreases as it moves towards a coil, while the magnitude of the induced current also A. increases B. zero C. decreases D. no change the magnitude of induced current also 2. As the strength of a magnet A. decreases; increases B. increases; increases C. increase; decreases D. decreases; no change

1. The speed of the magnet decreases as it moves towards a coil, while the magnitude of the induced current also A. increases B. zero C. decreases D. no change the magnitude of induced current also 2. As the strength of a magnet A. decreases; increases B. increases; increases C. increase; decreases D. decreases; no change

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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3. Induced Forces: Two conducting coils are arranged parallel to each other. The first coil is connected to a power supply so that the current is in at the top and out at the bottom. The voltage on the power supply is being decreased. a. What is the direction (left/right/zero) of the magnetic field (due to the first coil) as it goes through the 2nd coil? b. Is the magnetic flux increasing or decreasing? c. What is the direction of the induced magnetic field through the 2nd coil required to resist the change in magnetic flux? THK ε d. What is the direction (in at top/out at bottom or out at top/in at bottom) of the induced current in the 2nd coil required to produce the induced field needed? e. What is true of the magnetic force between the two coils? • The coils will attract each other. • The coils will repel each other. • There is no magnetic force between the coils. f. What is the direction of the induced current in the 2nd coil if the voltage of the power supply for the first coil…
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