Past mistakes - physics

1. 1(1) [blank_start]False[blank_end]. The i[blank_start]nput[blank_end] to a d[blank_start].c. motor[blank_end] is an [blank_start]electrica[blank_end]l s[blank_start]ource[blank_end]. The c[blank_start]oil[blank_end] [blank_start]rotate[blank_end]s
   when [blank_start]curren[blank_end]t, provided by the [blank_start]powe[blank_end]r s[blank_start]ource[blank_end], p[blank_start]asses[blank_end] th[blank_start]rough[blank_end] it, hence
   [blank_start]electrica[blank_end]l energy is converted to [blank_start]mechanica[blank_end]l energy.
   
   (2) [blank_start]Tru[blank_end]e. The s[blank_start]oft[blank_end] i[blank_start]ron[blank_end] core c[blank_start]oncentrates[blank_end] the m[blank_start]agnetic[blank_end] [blank_start]fiel[blank_end]d l[blank_start]ine[blank_end]s. As the c[blank_start]oil[blank_end]
   passes through the m[blank_start]agnetic[blank_end] [blank_start]fiel[blank_end]d, a g[blank_start]reater[blank_end] f[blank_start]orce[blank_end] is e[blank_start]xerted[blank_end] on it, causing
   the c[blank_start]oil[blank_end] to r[blank_start]otate[blank_end] f[blank_start]aster[blank_end].

   

   1. AFalse
   2. B.c. motor
   3. Celectrica
   4. Dource
   5. Eoil
   6. Frotate
   7. Gcurren
   8. Hpowe
   9. Iource
   10. Jelectrica
   11. Kmechanica
   12. LTru
   13. Moft
   14. Nron
   15. Oine
   16. Poil
   17. Qaster
   18. Rnput
   19. Sasses
   20. Trough
   21. Uagnetic
   22. Vfiel
   23. Wagnetic
   24. Xfiel
   25. Yreater
   26. Zorce
   27. AAxerted
   28. ABotate
   29. ACoil
   30. ADoncentrates
2. 2The coil already rotates clockwise. What would happen if exposed to this voltage?
   
   0 to 5 min: [blank_start]Clockwis[blank_end]e. Changing the d[blank_start]irection[blank_end] of c[blank_start]urrent[blank_end] through the c[blank_start]oil[blank_end]
   also changes the [blank_start]magneti[blank_end]c [blank_start]pole[blank_end]s on P and Q. Since *b[blank_start]oth[blank_end] the
   d[blank_start]irection[blank_end] o[blank_start]f[blank_end] c[blank_start]urrent[blank_end] and the d[blank_start]irection[blank_end] of m[blank_start]agnetic[blank_end] [blank_start]field[blank_end]s c[blank_start]hange[blank_end]*, the
   coil c[blank_start]ontinues[blank_end] to rotate in a [blank_start]clockwis[blank_end]e direction.
   
   5 to 10 min: [blank_start]Clockwis[blank_end]e. *The d[blank_start]irection[blank_end] of the c[blank_start]urrent[blank_end] t[blank_start]hrough[blank_end] the c[blank_start]oil[blank_end] and
   m[blank_start]agnetic[blank_end] [blank_start]field[blank_end] b[blank_start]etween[blank_end] P and Q* r[blank_start]evert[blank_end] to the o[blank_start]riginal[blank_end] d[blank_start]irections[blank_end],
   hence the coil rotates [blank_start]clockw[blank_end]ise.

   

   1. Aoth
   2. Birection
   3. Cf
   4. Durrent
   5. Eirection
   6. Fagnetic
   7. Ghange
   8. HClockwis
   9. IClockwis
   10. Joil
   11. Kmagneti
   12. Lpole
   13. Mclockwis
   14. Nirection
   15. Ourrent
   16. Phrough
   17. Qoil
   18. Ragnetic
   19. Sfield
   20. Tetween
   21. Uclockw
   22. Vfield
   23. Wevert
   24. Xriginal
   25. Yirections
   26. Zontinues
   27. AAirection
   28. ABurrent
3. 3What would happen to the motor if a steady a.c. voltage, as shown in
   Figure 4, is applied across X and Y?
   
   The [blank_start]coil[blank_end] rotates in a [blank_start]clockwise[blank_end] direction, but at a v[blank_start]ariable[blank_end] s[blank_start]peed[blank_end].
   The higher the [blank_start]voltage[blank_end] applied, the faster it [blank_start]rotates[blank_end].

   

   1. Acoil
   2. Bclockwise
   3. Cariable
   4. Dpeed
   5. Evoltage
   6. Frotates

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Physics Quiz on Past mistakes - physics, created by Potato Milk on 02/08/2017.

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