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Difficulty: MediumPhysics Fundamentals and Everyday Applications

Match the everyday devices and physical phenomena in List-I with their underlying governing physics principles in List-II:

  • Operation of a perfume atomizer sprayerBernoulli's Principle
  • Absorption of ink by blotting paperCapillary Action
  • Bending mechanism of a bimetallic thermostat stripDifferential Thermal Expansion
  • Shattering of a crystal glass by a sustained vocal pitchAcoustic Resonance

Answer

The correct pairings are: Operation of a perfume atomizer sprayer matches with Bernoulli's Principle; Absorption of ink by blotting paper matches with Capillary Action; Bending mechanism of a bimetallic thermostat strip matches with Differential Thermal Expansion; Shattering of a crystal glass by a sustained vocal pitch matches with Acoustic Resonance.
Each phenomenon is matched strictly with its primary physical mechanism: the perfume atomizer relies on fluid velocity creating pressure drops (Bernoulli's Principle), blotting paper uses narrow fiber channels to draw liquid (Capillary Action), bimetallic thermostats depend on unequal metal expansion rates under heat (Differential Thermal Expansion), and glass shattering occurs when forced vibrations match internal natural frequency (Acoustic Resonance).

Step-by-Step Solution

1
Analyze the fluid dynamics in an atomizer sprayer.
High fluid velocity over the nozzle causes a local pressure drop, drawing liquid up according to Bernoulli's Principle (P+12ρv2+ρgh=constantP + \frac{1}{2}\rho v^2 + \rho gh = \text{constant}).
Identify the fluid dynamic phenomenon responsible for suction in sprayers.
2
Examine the porous transport mechanism of liquid in paper.
Interconnected cellulose fibers act as fine capillaries drawing ink upward via adhesive and surface tension forces (Capillary Action).
Relate liquid movement in porous media to surface phenomena.
3
Analyze thermal behavior of bonded dissimilar metals.
Different coefficients of linear expansion (α\alpha) cause unequal length changes during temperature variations, bending the bimetallic strip.
Identify thermal properties exploited in temperature regulation switches.
4
Evaluate wave frequency matching in structural response.
Energy transfer is maximized when the driving sound frequency equals the glass structure's natural frequency (Acoustic Resonance).
Connect sound vibration phenomena to mechanical failure.

Key Concept

Everyday Applications of Classical Mechanics, Fluid Dynamics, Thermodynamics, and Wave Resonance
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Topics

Physics Fundamentals and Everyday Applications

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