7/29/2019 P2 - Homework Week 11 - Questions

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P2-Homeworkweek11[RevisionProblems]

1)Abodyofmass4.0gisattractedtowardsafixedpointbyaforcewhichis

proportionaltothedistanceofthemassfromthepoint.Whenthebodyis5.0cm

fromthepoint,theforceactingonthebodyis4.9x10-2N.Calculatetheperiod

ofthemotion.

2)Faradayslawofelectromagneticinductioncanbestatedinequationformas

follows:

=d

dt,where istheinducedemf, isthemagneticfluxandt

isthetime.

Acoilofwire,having50turnseachofarea40cm2,isplacedsothatamagnetic

fieldofstrength1.0x10-2Tentersthecoilatrightangles.Calculatetheaverage

inducedemfinthecoilifthefieldreducestozeroin6x10-2s.

3)Monochromaticlightofwavelength590nmfallsnormallyonagratingwhich

has4.5x103linescm-1.Calculate:

(i) thelargestorderofspectrumwhichisvisible.

(ii) theangularseparationofthesecondandthirdorderimages.

Answers:

1)0.4s

2)30mV

3)i)3ii)20.7degrees