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Karnataka PUC II Wave Optics — practice questions — page 3

Explore 74 free Wave Optics questions in Karnataka PUC II Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Wave Optics questions and exercises with answers

Showing questions 61–74 of 74.

Which transformer loss arises from currents induced in the iron core itself?Read the answer and worked solution →Which transformer loss arises from repeatedly reversing the magnetisation of the core?Read the answer and worked solution →Inductor against capacitorRead the answer and worked solution →Sort by phase behaviourRead the answer and worked solution →Light passes from air to glass ($n = 1.5$). Brewster's angle is:Read the answer and worked solution →HUYGENS' PRINCIPLE states that every point on a wavefront acts as a:Read the answer and worked solution →NEET · Physics · Interference or DiffractionRead the answer and worked solution →BREWSTER'S LAW for the polarising angle θ_B relates to the refractive index n as:Read the answer and worked solution →In single-slit diffraction, the central maximum is:Read the answer and worked solution →In Young's experiment, a BRIGHT fringe (constructive interference) requires path difference = ?Read the answer and worked solution →In Young's double-slit experiment, the fringe width β is given by:Read the answer and worked solution →The resolving power (RP) of a diffraction grating with N slits in the m-th order is:Read the answer and worked solution →The motional EMF induced in a conductor of length $\ell$ moving with velocity $v$ perpendicular to a uniform magnetic field $B$ is:Read the answer and worked solution →Polarisation of light is direct experimental evidence that light is a:Read the answer and worked solution →

Worked practice questions

Which transformer loss arises from currents induced in the iron core itself?

  1. Ending currents
  2. Echoing currents
  3. Eddy currents
  4. Edging currents
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Correct answer: C. Eddy currents

1. The alternating flux passes through the conducting core. 2. That flux induces circulating currents inside the metal. 3. The alternating magnetic flux induces eddy currents in the iron core and causes heating. 4. So the answer is eddy currents. _Source: syllabus Physics Part I, Ch 7 'Alternating Current'_

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Which transformer loss arises from repeatedly reversing the magnetisation of the core?

  1. Hydraulics
  2. Hyphenation
  3. Hydrolysis
  4. Hysteresis
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Correct answer: D. Hysteresis

1. The core is magnetised one way, then the other, every cycle. 2. Driving that reversal costs energy each time. 3. The magnetisation of the core is repeatedly reversed by the alternating magnetic field. 4. That loss is called hysteresis. _Source: syllabus Physics Part I, Ch 7 'Alternating Current'_

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Inductor against capacitor

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Categories
  1. Inductor
  2. Capacitor
Questions
  1. Answer
    Inductor
    Question
    Current lags the voltage
  2. Answer
    Capacitor
    Question
    Current leads the voltage
  3. Answer
    Inductor
    Question
    Opposition is called XL
  4. Answer
    Capacitor
    Question
    Opposition is called Xc
  5. Answer
    Inductor
    Question
    Reactance rises with frequency
  6. Answer
    Capacitor
    Question
    Reactance falls with frequency
Instructions
Pull each fact towards the component it belongs to.
_Source: syllabus Physics Part I, Ch 7 'Alternating Current'_

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More Physics topics

Moving Charges and MagnetismElectromagnetic Induction & Alternating CurrentElectromagnetic WavesSemiconductor ElectronicsElectric Charges and FieldsDual Nature of Radiation and MatterRay Optics and Optical InstrumentsCurrent Electricity