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Frequency Of A.C. Mains by Melde's Method

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1. What is a transverse wave?

  • A wave where particles vibrate perpendicular to the direction of wave propagation
  • A wave where particles vibrate in the same direction as the wave propagation
  • A wave that travels only through gases
  • A wave that creates electrical current in a conductor

2. In which media can transverse waves occur?

  • Only in solids and liquids
  • Only in gases
  • In solids, liquids, and gases
  • Only in solids

3. What is a longitudinal wave?

  • A wave where the medium particles vibrate in the same direction as the wave propagation
  • A wave where the medium particles vibrate perpendicular to the direction of wave propagation
  • A wave that propagates only through solids
  • A type of standing wave in a vacuum

4. What type of wave is typically observed in air?

  • Gravitational wave
  • Rotational wave
  • Transverse wave
  • Longitudinal wave

5. What are the characteristics of longitudinal waves?

  • Crest and trough formation
  • Compression and rarefaction formation
  • Occurs only in solids
  • Always produces loops

6. What is the purpose of connecting a bulb in series with a solenoid?

  • To provide resistance and prevent overheating of the coil
  • To amplify the current flow
  • To brighten the waveform display
  • To eliminate magnetic interference

7. What is a pulse in a string?

  • A localized disturbance that travels along the string
  • A sustained oscillation in the medium
  • A continuous compression of the wave
  • The point where two waves meet and cancel each other

8. What is inductance(L)?

  • The property of a circuit that opposes changes in electric current
  • A property that enhances electric current
  • The resistance of a wire to electricity
  • The measure of voltage in a circuit

9. What is mutual inductance?

  • The simultaneous use of AC and DC current in a single circuit
  • The flow of current in opposite directions in the same coil
  • Resistance due to heat in one coil
  • The generation of EMF in one coil due to a changing current in another coil

10. Why are only even numbers of loops observed in longitudinal wave arrangements?

  • Because of unequal tension in the string
  • Because each complete vibration of the rod causes half a vibration in the string
  • Due to resonance with the transverse wave
  • Due to phase difference in coil current

11. What is the correct condition for forming real loops in Melde’s experiment?

  • The frequency of the vibrator must match the natural frequency of the string (resonance condition)
  • The string must be very loose and the tension should be negligible
  • The wave must be longitudinal and travel in air
  • The string should be clamped at both ends tightly