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NEET UG Wave Optics — practice questions — page 2

Explore 87 free Wave Optics questions in NEET UG 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 31–60 of 87.

The current driven by an alternating voltage in a circuit is called:Read the answer and worked solution →The equivalent steady current giving the same average power loss is the:Read the answer and worked solution →Phase relationships between voltage and current in an ac circuit are shown using:Read the answer and worked solution →The quantity analogous to resistance for an inductor is called:Read the answer and worked solution →The opposition offered by a capacitor to alternating current is called:Read the answer and worked solution →What is the SI unit of inductive reactance?Read the answer and worked solution →In a purely resistive ac circuit, the voltage and the current are:Read the answer and worked solution →In a circuit containing an inductor, the current does what relative to the voltage?Read the answer and worked solution →In a circuit containing a capacitor, the current does what relative to the voltage?Read the answer and worked solution →At the resonant frequency of a series RLC circuit, the current amplitude is:Read the answer and worked solution →A current that flows while no power is dissipated is sometimes called a:Read the answer and worked solution →Why is ac voltage preferred over dc voltage for power distribution?Read the answer and worked solution →The household line voltage of 220 V is quoted as which kind of value?Read the answer and worked solution →A well designed transformer may reach an efficiency of more than:Read the answer and worked solution →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 →In 1678 a Dutch physicist proposed that light travels as a wave. He was:Read the answer and worked solution →Newton's famous book OPTICKS pushed which picture of light?Read the answer and worked solution →Light bends towards the normal on entering water. The wave model predicts its speed in water is:Read the answer and worked solution →Foucault measured the speed of light in water in 1850. He found it was:Read the answer and worked solution →Young's 1801 interference experiment firmly showed that light is a:Read the answer and worked solution →Yellow light has a wavelength of about 0.6 of which unit?Read the answer and worked solution →Maxwell found the speed of electromagnetic waves matched the speed of light. He concluded light is:Read the answer and worked solution →Your voice bends round a doorway but a hillock returns an echo. The hillock is:Read the answer and worked solution →Drop a stone in a calm pool. The ring of points all oscillating in phase is a:Read the answer and worked solution →A point source sends waves out evenly in all directions. Its wavefronts are:Read the answer and worked solution →By Huygens principle the new wavefront is the common ___ to all the secondary wavelets.Read the answer and worked solution →Two needles bob in a water trough with a phase difference that never changes. The sources are:Read the answer and worked solution →

Worked practice questions

The current driven by an alternating voltage in a circuit is called:

  1. Alternating current
  2. Alternating charge
  3. Alternative currency
  4. Alternating channel
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Correct answer: A. Alternating current

1. A source whose voltage reverses periodically is an alternating one. 2. The current it drives takes its name from the source. 3. The current driven by an alternating voltage is called the alternating current. 4. So the answer is alternating current. _Source: syllabus Physics Part I, Ch 7 'Alternating Current'_

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The equivalent steady current giving the same average power loss is the:

  1. Ratio of mean squares
  2. Root mean square
  3. Root median squad
  4. Rate of mean squares
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Correct answer: B. Root mean square

1. An alternating current averages to zero over a cycle. 2. A different average is needed to describe its heating effect. 3. That is the root mean square current. 4. It is the equivalent dc current producing the same average power loss. _Source: syllabus Physics Part I, Ch 7 'Alternating Current'_

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Phase relationships between voltage and current in an ac circuit are shown using:

  1. Phasors
  2. Phrases
  3. Photons
  4. Phonons
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Correct answer: A. Phasors

1. Voltage and current in an ac circuit peak at different moments. 2. A rotating vector picture makes that offset visible. 3. To show phase relationship between voltage and current we use the notion of phasors. 4. So the answer is phasors. _Source: syllabus Physics Part I, Ch 7 'Alternating Current'_

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More Physics topics

Electric Charges and FieldsMoving Charges and MagnetismRay Optics and Optical InstrumentsSemiconductor ElectronicsCurrent ElectricityDual Nature of Radiation and MatterKinetic Theory & OscillationsSystem of Particles and Rotational Motion