A dc motor with its rotor and field coils connected in series has an internalresistance of 2.00 Ω. When running at full load on a 120 V line, itdraws a 4.00 A current. What is the rate of dissipation of energy in the internal resistance?

Q: 1 external magnetic field of 10° gauss. tom change?

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Q: 10

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A: Given data, Lz,L±=±ħL± therefor,  L±,Lz=∓ħL±     Using commutator property      ......1 To prove, L+...

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Q: 76. Interference Two identical tuning forks are struck, one a fraction of a second after the other. ...

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Q: 15

A: We can use Malus law to solve this problem.

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A: Solution Given Below:

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A: as per condition 1) value of α and β     2) value of η in lossy medium  

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Q: 7

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A: The diagram can be redrawn as below,

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A: Given,  Q=r1-r=0.951-0.95=19.5Width of the emission line calculated as followsQ=ϑ0∆ϑ∆ϑ=1Qϑ0=1Qcλ=119...

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