Frequency Of A.C. Mains by Melde's Method
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
- In solids, liquids, and gases
- Only in gases
- Only in solids and liquids
3. What is a longitudinal wave?
- A wave where the medium particles vibrate in the same direction as the wave propagation
- A type of standing wave in a vacuum
- A wave where the medium particles vibrate perpendicular to the direction of wave propagation
- A wave that propagates only through solids
4. What type of wave is typically observed in air?
- Longitudinal wave
- Rotational wave
- Transverse wave
- Gravitational wave
5. What are the characteristics of longitudinal waves?
- Occurs only in solids
- Always produces loops
- Crest and trough formation
- Compression and rarefaction formation
6. What is the purpose of connecting a bulb in series with a solenoid?
- To brighten the waveform display
- To amplify the current flow
- To provide resistance and prevent overheating of the coil
- To eliminate magnetic interference
7. What is a pulse in a string?
- A continuous compression of the wave
- A sustained oscillation in the medium
- A localized disturbance that travels along the string
- The point where two waves meet and cancel each other
8. What is inductance(L)?
- A property that enhances electric current
- The property of a circuit that opposes changes in electric current
- The measure of voltage in a circuit
- The resistance of a wire to electricity
9. What is mutual inductance?
- The flow of current in opposite directions in the same coil
- The simultaneous use of AC and DC current in a single circuit
- 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 phase difference in coil current
- Due to resonance with the transverse wave
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 string should be clamped at both ends tightly
- The wave must be longitudinal and travel in air
